1. Who among the following gave the first experimental value of G?

A. Maxwell B. Newton C. Galileo D. Cavendish

Answer: Option D
Explanation:
The Cavendish experiment, performed in 1797–1798 by British scientist Henry Cavendish, was the first experiment to measure the force of gravity between masses in the laboratory and the first to yield accurate values for the gravitational constant.
2. One watt-hour is equal to

A. 4.2×103J B. 1.5×103J C. 3.6×103J D. 2.3×103J

Answer: Option C
Explanation:
A kilowatt-hour is a derived unit of energy equal to 3.6 megajoules. If the energy is being transmitted or used at a constant rate (power).
3. Boyle’s law holds good for any gas at _____

A. Low Temperature, Low Pressure B. Low Temperature, High Pressure C. High Temperature, High Pressure D. High Temperature, High Pressure

Answer: Option B
4. The angle of friction and angle of repose are

A. Equal B. Different C. Can’t tell D. Depend upon the medium

Answer: Option A
Explanation:
Tanθ = Tanɑ (tanɑ = μ)
where ‘ɑ’ is the angle of friction
θ = ɑ Angle of repose is equal to the angle of friction.
5. The Reflection of an electric room heater is most effective if it is

A. Elliptical B. Parabolic C. Spherical D. Cylindrical

Answer: Option B
Explanation:
The Reflection of an electric room heater is most effective if it is Parabolic.
6. The Specific resistance of a wire depends upon the ............................

A. Length B. Mass C. Material D. Cross Section

Answer: Option C
Explanation:
The Specific resistance of a wire depends upon the nature of the Material.
7. ................. line indicate the direction of magnetic maredian

A. Magnetic equator B. Adriatic lines C. Agomic lines D. Duperrey’s lines

Answer: Option D
Explanation:
Duperrey’s lines indicate the direction of magnetic maredian
8. Which type of connection is used in the domestic electrical wiring ?

A. Series B. Parallel C. Shunt D. Serial- Parallel

Answer: Option B
Explanation:
Parallel connection is used in the domestic electrical wiring. In parallel circuit, if one electrical appliance stops working due to some defect, then all other appliances keeps working normally.
9. ......................... Forces are always balanced

A. Internal Force B. Strong Force C. Weak Force D. External Force

Answer: Option A
Explanation:
Internal forces are forces exchanged by the objects in the system. To determine what part should be considered external and internal, mechanical system should be clearly defined.
10. .................. does not have sharp melting point

A. Urea B. Mercury C. Water D. Glass

Answer: Option D
Explanation:
Urea is a pure crystalline compound so has a sharp melting point whereas, glass is an amorphous compound.
11. Electrical Potential on Earth is considered to be .......................

A. Unity B. Zero C. Maximum D. Minimum

Answer: Option A
Explanation:
The nature of potential is that the zero points is arbitrary; it can be set like the origin of a coordinate system. That is not to say that it is insignificant; once the zero of potential is set, then every value of potential is measured with respect to that zero.
12. ..................... is the study of the atmosphere

A. Agrobiology B. Aerology C. Agrology D. Aerobiology

Answer: Option B
Explanation:
The branch of meteorology involving the observation of the atmosphere by means of balloons, airplanes, etc.
13. Oxygen is .........................

A. Ferromagnetic B. Magnetic C. Paramagnetic D. Diamagnetic

Answer: Option C
Explanation:
Gaseous oxygen is paramagnetic also but is moving too fast to be affected by the magnets. The reason that it is paramagnetic is because the oxygen molecule has two unpaired electrons.
14. Mass-energy relation is given by

A. Peter W Higgs B. Galileo C. Newton D. Albert-Einstein 5.None of these

Answer: Option D
Explanation:
Albert Einstein’s mass-energy equation E = m[latex]{c}^{2}[/latex]
15. ...................... is a unit of Magnetic Flux

A. Kelvin B. Fermi C. Weber D. Radian

Answer: Option C
Explanation:
In physics, the Weber is the SI unit of magnetic flux. A flux the density of one Web/[latex]{m}^{2}[/latex] is one tesla.
16. The light reflected from Moon takes ................. to reach Earth

A. 1.5s B. 3s C. 8s D. 1.28s

Answer: Option D
Explanation:
Light takes 1.28 s to travel from the moon to Earth
17. Cooking Utensils are made of aluminium, brass and steel because these substance have ................................... and ....................

A. Low specific heat and low conductivity B. High specific heat and high conductivity C. Low specific heat and high conductivity D. High specific heat and low conductivity

Answer: Option C
Explanation:
Cooking utensils are made of aluminium brass and steel because these substance have low specific heat and high conductivity.
18. Size of image is always ................ to size of object

A. Equal B. Greater C. Smaller D. Depend Upon the distance

Answer: Option A
Explanation:
The image distance always equals the object distance. The size of the image is the same as the object (the mirror does not magnify)
19. When Kerosene oil is sprinkled on water, its surface tension

A. Increases B. Decreases C. Either Increases or Decreases D. Constant

Answer: Option B
Explanation:
If Kerosene oil is sprinkled on water, its surface tension lowered
20. If each number greater than 1 then the body is called as

A. Supersonic B. Hypersonic C. Subsonic D. All of these

Answer: Option A
Explanation:
If each number greater than 1 then the body is called as Supersonic. Aircraft designed to fly at supersonic speeds show large differences in their aerodynamic design because of the radical differences in the behavior of flows above Mach 1.

1. One Astronomical unit is the average distance between ....................... and .......................

A. Earth , Sun B. Sun, Mars C. Moon, Sun D. Earth, Moon

Answer: Option A
Explanation:
One Astronomical unit is the average distance between the Earth and the Sun.
2. .................. is used for making an electromagnet

A. Copper B. Iron C. Aluminium D. Nickel

Answer: Option B
Explanation:
The soft iron inside the coil makes the magnetic field stronger because it becomes a magnet itself when the current is flowing.
3. .................. is a unit of Astronomical Distance

A. Para/Sec B. Sec C. Parasec D. Metersec

Answer: Option C
Explanation:
A parsec is a unit of length used to measure large distances N to objects outside the Solar System. One parsec is the distance at which one astronomical unit subtends an angle of one arc second.
4. A body will not radiate any heat energy at ................

A. [latex]{0}^{0}[/latex]C B. [latex]{100}^{0}[/latex]C C. [latex]{300}^{0}[/latex]C D. [latex]{-273}^{0}[/latex]C

Answer: Option D
Explanation:
At 0 deg Celsius radiation would continue. It would totally stop only when it is at -273 deg Celsius or 0 kelvin. ie absolute zero.
5. The speed of light is maximum for which colour ?

A. Red B. Green C. Blue and Yellow D. None of these

Answer: Option D
Explanation:
The speed of light is same for all the colours.
6. The conversion of heat energy into electrical energy is achieved by

A. Diodes B. Thermocouple C. Coils D. Resistors

Answer: Option B
Explanation:
The conversion of heat energy into electrical energy is achieved by Thermocouple.
7. Recording a permanent three dimensional photograph of a single or multi colour is known as

A. Stylography B. Iconography C. Holography D. Stereoscopy

Answer: Option C
Explanation:
Holography is the science and practice of making holograms. Recording a permanent three-dimensional photograph of a single or multicolor.
8. Persistence of vision is the principle behind which among the following?

A. Cinema B. Telescope C. Periscope D. Microscope

Answer: Option A
Explanation:
Persistence of vision refers to the optical illusion whereby multiple discrete images blend into a single image in the human mind and believed to be the explanation for motion perception in cinema and animated films. Like other illusions of visual perception, it is produced by certain characteristics of the visual system.
9. .................. is used for accurately measuring very small intervals

A. Analog Clock B. Quartz Clock C. Digital Clock D. Atomic Clocks

Answer: Option D
Explanation:
To measure very small time intervals, atomic clocks may be used
10. Cryogenic engine finds application in............

A. Submarines B. Super Conductivity C. Rocket Technology D. Nuclear Energy

Answer: Option C
Explanation:
ISRO successfully used an indigenous cryogenic engine in a rocket technology.
11. The line joining the places of the same declination are called .........................

A. Isodynamic lines B. Aclinic lines C. Agoonic lines D. Isogenic lines

Answer: Option D
Explanation:
Isogenic lines These join the places of equal declination. A line joining the places of zero declination is called agonic line
12. The least distance of distinct vision is ........................

A. 25cm B. 20m C. 15cm D. 10m

Answer: Option A
Explanation:
The least distance of distinct vision is 25cm. This distance is about 25 cm from the eye.
13. ................. is the region in which no light reaches

A. Penumbra B. Opaque C. Umbra D. Transparent

Answer: Option C
Explanation:
Since no light reaches the screen in this region, a total shadow, or umbra, is formed.
14. The Choke is used in Fluorescent lamp to

A. Decrease the current flow B. Increase the current flow C. Decrease the Resistance D. Decrease the Voltage

Answer: Option B
Explanation:
The purpose of choke in a fluorescent lamp is to increase the current flow.
15. Spring tides occur

A. No moon Day B. Full Moon Day C. New Moon day D. Full moon day as well as new moon day

Answer: Option D
Explanation:
Spring tides occur during the full moon and the new moon day
16. The mercury and sodium street lamps based on ______

A. Atomic Emission B. Electron absorption C. Electron Emission D. Atomic absorption

Answer: Option C
Explanation:
The mercury and sodium street lamps light up because of Electron Emission.
17. A helium atom loses an electron it becomes ......................

A. Proton B. Alpha Particle C. Negative Helium Ion D. Positive Helium Ion

Answer: Option D
Explanation:
When a helium atom loses an electron it becomes Positive Helium Ion.
18. The line joining the places of zero dip is called

A. Isodynamic lines B. Aclinic lines C. Agoonic lines D. Isogenic lines

Answer: Option B
Explanation:
The line joining the places of zero dip is called Aclinic lines
19. Catalytic converters generally made from ................

A. Alkaline Metals B. Post-transition metal C. Transition Metals D. Alkali metal

Answer: Option C
Explanation:
Catalytic converters generally made from Transition Metals. These metals are an element that is used as a bridge
20. The emf of the Leclanche cell is

A. 1.2 V B. 1V C. 1.5V D. 0.5V

Answer: Option C
Explanation:
The Leclanche cell has an electromotive force (e.m.f.) of about 1.5 V.

1. If lift is stationary or moving with uniform speed, the apparent weight of a body is .............. true weight

A. More than the B. Equal to its C. Less than the D. Become zero

Answer: Option B
Explanation:
If lift is stationary or moving with uniform speed ( either down or upward) , the apparent weight of a body is equal to its true weight.
2. Under the elastic limit, stress is proportional to strain according to ..................

A. Hooke’s law B. Bernoulli’d Theorem C. Newton’s law D. Doppler effect

Answer: Option A
Explanation:
Hooke’s law stating that the strain in a solid is proportional to the applied stress within the elastic limit of that solid.
3. ...................... is the reverse process of sublimation

A. Conditioning B. Vaporisation C. Hoar Frost D. Condensation

Answer: Option C
Explanation:
Hoar Frost is the reverse process of sublimation.This is a fairly common occurrence in nature and is called hoar frost or hoar ice.
4. The region in which region, partial of the light reaches is called as ........

A. Umbra B. Opaque C. Transparent D. Penumbra

Answer: Option D
Explanation:
Partial solar eclipses occur when the viewer is inside the penumbra.
5. SI unit of power of lens is .........................

A. Centimeter B. Dioptre C. Meter D. All of these

Answer: Option B
Explanation:
A dioptre or diopter is a unit of measurement of the optical power of a lens or curved mirror, which is equal to the reciprocal of the focal length
6. The velocity of a medium is maximum for that colour for which refractive index is ..............

A. Maximum B. Minimum C. Equal D. Can’t tell

Answer: Option B
Explanation:
The velocity of a medium is maximum for that colour for which refractive index is Minimum. Refractive Index is maximum for violet and minimum for red colour.
7. .................. is/are example of naturally negative charged material

A. Flannel B. Shellac C. Amber & Resin D. All of these

Answer: Option D
Explanation:
Flannel, Shellac, Amber, Resin are example of naturally negative charged material.
8. SI unit of intensity of illumination is ........................

A. lumen B. Angstrom C. Lux D. Weber

Answer: Option C
Explanation:
Lux, lux meter unit of illumination in the International System of Units (SI). One lux is the amount of illumination provided when one lumen is evenly distributed over an area of one square metre.
9. Sound travels at the fastest speed in ................

A. Air B. Water C. Oil D. Steel

Answer: Option D
Explanation:
Sound travels faster in steel than in air
The speed of sound in air is 344 m/s
The speed of sound in steel is 5960 m/s
In fresh water, sound travels at about 1497 m/s
10. Heat stored in water vapour is ...............

A. Latent heat B. Specific heat C. Heat resistance D. All of these

Answer: Option A
Explanation:
Latent heat is energy released or absorbed, by a body or a thermodynamic system.Latent heat is associated with the phase changes of atmospheric water vapor, mostly vaporization and condensation.
11. An atomic clock is based on transitions in ..................................

A. Hydrogen B. Ceasium C. Calcium D. Carbon

Answer: Option B
Explanation:
A caesium standard or caesium atomic clock is a primary frequency standard in which electronic transitions between the two hyperfine ground states of caesium-133 atoms are used to control the output frequency. The first caesium clock was built by Louis Essen in 1955 at the National Physical Laboratory in the UK.
12. A convex lens always form an image which is

A. Virtual and inverted B. Real and inverted C. Real and erect D. Virtual and diminished

Answer: Option D
Explanation:
A convex mirror forms a virtual, diminished and upright image of an object. A concave lens always form an image which is Virtual and erect
13. The Propagation of sound waves in a gas involves which of the following?

A. Isobaric compression and reflection B. Isothermal compression and rarefaction C. Adiabatic compression and rarefaction D. Isochoric compression and reflection

Answer: Option C
Explanation:
An adiabatic process is one that occurs without the transfer of heat or matter between a thermodynamic system and its surroundings. In an adiabatic process, energy is transferred only as work Rarefaction is the reduction of an item’s density, the opposite of compression.
14. Which of the following color light has the highest velocity through vacuum?

A. Green B. Red C. Blue D. All of these

Answer: Option D
Explanation:
All the transverse electromagnetic waves in vacuum have the same speed.
15. Sun’s light appears to travel as............ beams towards earth

A. Parallel B. Diverging C. Converging D. Random

Answer: Option A
Explanation:
Sun’s light appears to travel as parallel beams towards earth 1. Sun produces electromagnetic radiations through pp chain
16. Which of the following does not contain silver?

A. Ruby Silver & Horn Silver B. Nickel Silver C. German Silver D. Both B and C

Answer: Option D
Explanation:
The usual formulation is 60% copper, 20% nickel and 20% zinc.Nickel silver is named for its silvery appearance, but it contains no elemental silver unless plated.
17. Alpha Particle is the nucleus of an atom of which of the following?

A. Carbon B. Radium C. Hydrogen D. Helium

Answer: Option D
Explanation:
Alpha particles are helium atoms
18. Coating of Solid waste with impervious material is known as ..................

A. stockpiling B. Landfill C. Encapsulation D. incineration

Answer: Option B
Explanation:
Solid wastes produced from coating lines are disposed of in three ways: (l) incineration, (2) landfill, and (3) stockpiling.
19. Ultraviolet rays can be used in water treatment as ...................

A. Distillation B. Contamination C. Disinfectant D. Condensation

Answer: Option C
Explanation:
UV disinfects water containing bacteria and viruses and can be effective against protozoans like, Giardia lamblia cysts or Cryptosporidium oocysts.
20. Natural magnet is ........................

A. Oxides of Iron B. Oxides of Hydrogen C. Oxides of Carbon D. Oxides of Magnesium

Answer: Option A
Explanation:
Magnetite is a mineral and one of the three common naturally-occurring oxides of iron. Its chemical formula is F[latex]{e}_{3}[/latex][latex]{O}_{4}[/latex], and it is a member of the spinel group.

1. Remote Sensing device has an inbuilt source of ...............................

A. Infrared Ray B. UV Rays C. X-Rays D. Radio Waves

Answer: Option A
Explanation:
The Remote Sensing Device (RSD) is a unique system that enables to measure individually the emissions of vehicles in motion, it has an inbuilt source of Infrared Ray.
2. An air bubble in water will act like a .............. lens

A. Fresnel B. Concave C. Biconvex D. Convex

Answer: Option B
Explanation:
The air bubble will act as a concave lends as light rays exiting the bubble will diverge like they do in a concave lens.
3. For a person having hypermetropia, the near point is .......................

A. Greater than 20 cm B. Lesser than 25cm C. Greater than 25cm D. Lesser than 30cm

Answer: Option C
Explanation:
Hypermetropia Myopia is corrected by spectacles having concave lens.Near point of aperson suffering from hypermetropia is more than 25cm.
4. Cryogenic is a science deals with

A. High Temperatures B. Low Pressure C. High Pressure D. Low Temperatures

Answer: Option D
Explanation:
Cryogenics is the study of the production and behaviour of materials at very low temperatures.
5. Supersonic Plan fly with the speed

A. Greater than the half of the speed of the light B. Greater than the speed of the sound C. Equal to the speed of the sound D. Lesser than the speed of the sound

Answer: Option B
Explanation:
A supersonic aircraft is an aircraft able to fly faster than the speed of sound (Mach number 1).
6. A device which is used to limit the current in an electrical circuit is called ..................

A. Capacitor B. Resistor C. Invertor D. Fuse

Answer: Option D
Explanation:
Fuses and breakers limit the current which can flow in a circuit.
7. If a copper wire is increased to double its length, its resistance will become ...............

A. No change B. Half C. Double D. Triple

Answer: Option C
Explanation:
Doubling the length will double the resistance, but the wire also must get thinner as it is stretched, because it will contain the same amount of metal in twice the length.
8. ...................... has the highest pitch

A. House Fly B. Mosquito C. Human Being D. Elephant

Answer: Option B
Explanation:
The Mosquito or Mosquito alarm is an electronic device used to deter loitering by young people by emitting sound at high frequency.
9. Lightning rods are mostly made up of .............

A. Copper B. Carbon C. Sodium D. Nickel

Answer: Option B
Explanation:
The main attribute common to all lightning rods is that they are all made of conductive materials, such as copper and aluminum. Copper and its alloys are the most common materials used in lightning protection.
10. ................... is a unit of force specified in the centimetre–gram–second system of units (CGS)

A. Joule B. Coloumb C. Newton D. Dyne

Answer: Option D
Explanation:
The dyne is a unit of force specified in the centimetre– gram–second system of units (CGS), a predecessor of the modern SI. One dyne is equal to [latex]{10}^{-5}[/latex]N
11. Which of the following is/are property of heavy water ?

A. Heavy Water produces Corrosion B. Freezing point of heavy water is higher than that of ordinary water C. Density of ordinary water is lesser than that of heavy water & oiling point of heavy water is higher than that of ordinary & water D. All of these

Answer: Option D
Explanation:
Heavy water is colorless, odourless and tasteless mobile liquid.. The higher viscosity of heavy water is responsible for lower the solubility of ionic solids like NaCl and smaller mobility ions.
12. Which of the following is related to illumination?

A. Birch’s law B. Lambert’s law C. Archie’s law D. Darcy’s law

Answer: Option B
Explanation:
In optics, Lambert’s cosine law says that the radiant the intensity or luminous intensity observed from an ideal diffusely reflecting surface or ideal diffuse radiator is directly proportional to the cosine of the angle θ between the observer’sline of sight and the surface normal.
13. Shock absorbers are usually made of steel as it has ....................

A. High B. Low elasticity C. Low rigidity D. High elasticity

Answer: Option D
Explanation:
A shock absorber (in reality, a shock “damper”) is a mechanical or hydraulic device designed to absorb and damp shock impulses. It does this by converting the kinetic energy of the shock into another form of energy (typically heat) which is then dissipated
14. The time period of a pendulum ...................... When it will take to the moon

A. Increases B. No change C. Decreases D. Increases and then decreases

Answer: Option A
Explanation:
The time period of a pendulum increase when it will taken to the moon time period will increase because the frequency will decrease on the Moon.
15. ....................... of a chemical element is the spectrum of frequencies of electromagnetic radiation emitted due to an atom’s electrons making a transition from a higher energy state to a lower energy state

A. Continuous Spectra B. Absorption Spectra C. Emission Spectra D. Line Spectra

Answer: Option C
Explanation:
Emission Spectra of a chemical element is the spectrum of frequencies of electromagnetic radiation emitted due to an atom’s electrons making a transition from a higher energy state to a lower energy state.
16. Which of the following proved the presence of nucleus in an atom?

A. Rutherford’s Refraction experiment B. Rutherford’s scattering experiment C. Rutherford’s scattering experiment D. Rutherford’s Reflection experiment

Answer: Option B
Explanation:
Rutherford’s scattering experiment proved the presence of nucleus in an atom. Rutherford scattering is the elastic scattering of charged particles by the Coulomb interaction
17. Persistence of Vision is responsible for the working of Newton’s which of the following?

A. Colour disc experiment B. Theory of light C. Prism Experiment D. Colour Wheel Experiment

Answer: Option A
Explanation:
A Newton disc, invented by Isaac Newton, is a disc with seven segments in rainbow colors. When the disc is rotated, the colors fade to white; In this way Isaac Newton demonstrated that white light is a combination of the seven different colors found in a rainbow. A Newton Disc can be created by painting a disc with the seven different colors. A combination of red, green and blue in the circular disc will yield the same result. This is due to the phenomenon called persistence of vision.
18. Bragg spectrometer is one of the important method for studying crystals using

A. γ rays B. X-rays C. β rays D. α rays

Answer: Option B
Explanation:
Bragg’s spectrometer method is one of the importantmethod for studying crystals using X-rays. The apparatus consists of an X-ray tube from which a narrow b.
19. ................. are first recorded by Seismograph

A. M-Waves B. S-Waves C. L-Waves D. P-Waves

Answer: Option D
Explanation:
Seismology is the study of earthquakes and seismic waves that move through and around the earth.The first kind of a body wave is the P wave or primary wave.
20. The Nuclear Force is short range ................

A. Attractive Force B. Repulsive Force C. Either Attractive or Repulsive force D. Electrostatic force

Answer: Option A
Explanation:
The nuclear force is a residual effect of the more fundamental strong force, or strong interaction. The strong interaction is the attractive force that binds the elementary particles called quarks together to form the nucleons themselves. The strong nuclear force has a range of about 1 fm.

1. The Ideal gas equation is

A. PV = nRT B. PV = R/T C. PV = RT D. PT = VR

Answer: Option A
Explanation:
The ideal gas equation is PV = nRT
2. The specific heat of water is

A. 1 B. 1.5 C. 2 D. 0.5

Answer: Option A
Explanation:
The specific heat of water is 1 calorie/gram °C = 4.186 joule/gram °C which is higher than any other common substance.
3. According to Kelvin-Planck statement, which of the following is true ?

A. Conversion of work into heat B. Conversion of heat into energy C. Conversion of energy into work D. Conversion of heat into work

Answer: Option D
Explanation:
The Kelvin–Planck statement of the second law of thermodynamics states that it is impossible to devise a cyclically operating device, the sole effect of which is to absorb energy in the form of heat from a single thermal reservoir and to deliver an equivalent amount of work
4. Heat transfer from a colder body to a hotter body, where both have finite thermal capacity.This is according to

A. Kelvin statement B. Ohm Statement C. Clausius statement D. Coloumb Statement

Answer: Option C
Explanation:
Clausius statement to rule out heat transfer from a colder body to a hotter body, where both have finite thermal capacity.
5. Cavitation is the formation of vapour cavities in a

A. Acid B. Gas C. Soild D. Liquid

Answer: Option D
Explanation:
Cavitation is the formation of vapour cavities in a liquid – i.e. small liquid-free zonesthat are the consequence of forces acting upon the liquid.
6. Reynolds number is related to

A. Pressure B. Velocity C. Viscosity D. Density

Answer: Option D
Explanation:
The Reynolds number is an experimental number used in fluid flow to predict the flow velocity at which turbulence will occur.
7. Which of the following is true ?

A. It depends upon atmosphere B. Hot air is less dense than cool air C. Hot air balloon not rises D. Hot air is more dense than cool air

Answer: Option D
Explanation:
The hot air balloon rises because hot air is less dense than cool air; the heated air causes the balloon to rise simply because it is lighter than an equal volume of cold air.
8. The ground state binding energy of positronium is half of that of

A. Hydrogen B. Oxygen C. Nitrogen D. Helium

Answer: Option D
Explanation:
Positronium (Ps) is a system consisting of an electron and its anti-particle.The ground state binding energy of positronium is half of that of Hydrogen.
9. One Dyne is equal to

A. [latex]{10}^{-4}[/latex]N B. [latex]{10}^{-5}[/latex]N C. [latex]{10}^{-2}[/latex]N D. [latex]{10}^{-4}[/latex]N

Answer: Option B
Explanation:
One dyne is equal to 10−5 N or to 10 NSN (nanosthenes) in the old metre–tonne–second system of units.
10. ................ is the ratio of the flow inertia to the external field

A. Reynold Number B. Boltzmann Constant C. Avogadro Number D. Froude Number

Answer: Option D
Explanation:
Froude number (Fr) is a dimensionless number defined as the ratio of the flow inertia to the external field
11. When we rub hands which of the following Conversion will happen?

A. Mechanical energy converted into Heat energy B. Chemical energy converted into Heat energy C. Mechanical energy converted into Electrical energy D. Electrical energy converted into Heat energy

Answer: Option A
Explanation:
When we rub hands, the mechanical energy due to friction between the hands is converted into heat energy
12. During charging of a battery chemical energy is converted into

A. Optical Energy B. Electrical energy C. Mechanical energy D. Electronic energy

Answer: Option B
Explanation:
When the battery is connected to the circuits of an electric forklift truck, its chemical energy is converted into electrical energy and released.
13. During respiration, food is converted into .................. and ................

A. Carbon dioxide, Water B. Water, Carbon monoxide C. Hydrogen, Carbon D. Nitrogen, Hydroxide

Answer: Option A
Explanation:
Respiration is the chemical reactions that take place within cells by which food is “burned” and converted into carbon dioxide and water.
14. When water is lifted into an overhead tank, electrical energy is converted into

A. Mechanical Energy B. Thermal Energy C. Potential Energy D. Kinetic Energy

Answer: Option D
Explanation:
When water is lifted int an overhead tank using a motor, it converts electric energy to kinetic energy.
15. Water stored in a dam possesses which energy?

A. Electrical Energy B. Potential energy C. Kinetic energy D. Solar Energy

Answer: Option C
Explanation:
Water stored in a dam possesses (d) potential energy and once the water is falling it has kinetic energy.
16. An arrow is stretched in a bow, which energy is converted into potential energy?

A. Heat energy B. Chemical energy C. Kinetic energy D. Mechanical energy

Answer: Option D
Explanation:
When a bow with an arrow is stretched, the mechanical energy is converted into potential energy.
17. Which part of eye control the amount of light entering into the eye?

A. Retina B. Cornea C. Iris D. Eye-lids

Answer: Option C
Explanation:
The iris has an adjustable circular opening called the pupil, which can expand or contract to control the amount of light entering the eye.
18. The green color glass will allow ............... to pass through it

A. Only Green B. Only White C. Only Black D. All colors

Answer: Option A
Explanation:
Green cellophane/glass will only allow green light to pass through it.
19. 1 Slung =?

A. 16.4kg B. 14.6kg C. 15kg D. 13.6 kg

Answer: Option B
Explanation:
A unit of measure for mass in the English system, which equals 14.6 kg in the SI system.
20. One ton is equal to ...................lb

A. 500 B. 1000 C. 2000 D. 10000

Answer: Option C
Explanation:
The ton is a unit of measure. 1 ton is equal to 2000lb