Physics MCQs for SSC-CGL, UPPSC, NDA, CDS and all one-day examinations of India.
1. Thin lamination is used in a transformer to reduce:
[A] Eddy current losses[B] Hysteresis losses
[C] Corona losses
[D] None of the above
2. Ohm is a unit of measuring _________?
[A] Resistance[B] Voltage
[C] Current
[D] None of the above
3. Which among the following has the highest velocity?
[A] Hurricane[B] Tornado
[C] Typhoon
[D] Cyclone
4. Crystals of which of the following naturally-occurring substances exhibit both ‘pyroelectric’ and ‘piezoelectric’ properties, making it versatile for application in the field of electronics?
[A] Quartz[B] Mica
[C] Topaz
[D] Graphite
5. With reference to nuclear energy, what is the Special Nuclear Material (SNM)?
[A] A nuclear material that is NOT capable of sustaining a chain reaction of nuclear fission[B] A fissile material that is capable of sustaining a chain reaction of nuclear fission
[C] A fissile material that is NOT capable of sustaining a chain reaction of nuclear fusion
[D] A fissile material that is capable of sustaining a chain reaction of nuclear fusion
6. Two pieces of ice at 0°C would freeze together if pressed against each other and then released. In this context, which among the following is the correct principle in action?
[A] The melting point of pure ice decreases with pressure.[B] The melting point of pure ice increases with pressure
[C] The melting point of pure ice first increases, then decreases with pressure
[D] The melting point of pure ice first decreases, then increases with pressure
7. If a Candle is made to burn in Zero Gravity:
[A] The Candle will burn for a very long time compared to normal gravity[B] The flame of the candle will become round
[C] There is no impact of gravity on the burning of the candle
[D] The Candle will not burn in zero gravity
8. What is the range of Strong Nuclear force?
[A] Infinite[B] Very short Subnuclear size
[C] Very short Nuclear size
[D] None
9. Who was the first scientist to discover Electrons?
[A] Albert Einstein[B] Isaac Newton
[C] J.C. Bose
[D] J.J. Thompson
10. The force between charged particles is called as:
[A] Nuclear Force[B] Gravitational Force
[C] Centrifugal Force
[D] Electromagnetic Force
11. What is the slope of the velocity-time graph when an object moves with constant negative acceleration, having positive initial velocity?
[A] 90°[B] more than 90°
[C] less than 90°
[D] 0°
12. Which of these physical quantities is a vector quantity?
[A] Temperature[B] Speed
[C] Gravitational Intensity
[D] Work
13. Angle of friction is _______:
[A] equal to angle of repose[B] equal to twice the angle of repose
[C] is greater than the angle of repose
[D] is less than the angle of repose
14. The second law of motion gives us a measure of which of the following physical quantities?
[A] Acceleration[B] Force
[C] Power
[D] Work done
15. Which of the following is NOT correct about an inelastic collision?
[A] Linear momentum is conserved[B] Kinetic energy is conserved
[C] Total energy is conserved
[D] Some or all the forces involved may be non-conservative in nature
16. The work done in moving a body over a smooth inclined plane does not depend on which of the following?
[A] Mass of the body[B] Height of the inclined plane
[C] Slope of the inclined plane
[D] All of the above
17. At sea level, what is the difference between the value of acceleration due to gravity at the poles and at the equator?
[A] No difference[B] 9.8 cm s-2
[C] 1.80 cm s-2
[D] None of the above
18. On which of the following does the gravitational force between two objects not depend?
[A] Gravitational constant[B] Distance between the objects
[C] Product of the masses of the objects
[D] Sum of the masses of the objects
19. Which of the following statements about Pressure and Stress is NOT correct?
[A] Pressure is always normal to the area[B] Pressure is always compressive in nature
[C] Stress can be normal or tangential to the area
[D] Stress is always compressive in nature
20. What do we call the centre of gravity of the liquid displaced by a body?
[A] Fluidic centre[B] Meta-centre
[C] Centre of buoyancy
[D] None of the above
21. What number does orange colour represent in the resistance colour code?
[A] 1[B] 2
[C] 3
[D] 4
22. Which of the following nuclear processes is the source of energy output in the interior of stars?
[A] Nuclear Fission[B] Nuclear Fusion
[C] Both a and b
[D] None
23. In which of these transistors, the two segments of n-type semiconductor are separated by a segment of p-type semiconductor?
[A] p-n-p transistor[B] n-p-n transistor
[C] Both a and b
[D] None
24. How does a semiconductor behave at absolute zero temperature?
[A] Like an insulator[B] Like a conductor
[C] Depends on the material
[D] None of the above
25. Which of these instruments is used to measure the wind speed?
[A] Inclinometer[B] Calorimeter
[C] Anemometer
[D] Fathometer
26. Which of the following is the function of calorimeter?
[A] Measures the amount of calories in the body[B] Measures the heat of chemical reactions and physical change
[C] Measures the density of an object
[D] None of the above
27. What should a person on a freely rotating turntable do to decrease his (angular) speed?
[A] Sit down with raised hands[B] Bring his hands down
[C] Raise his hands up
[D] Spread his hands outwards
28. In science, a push or pull of an object is called which of the following?
[A] Lift[B] Pick
[C] Shut
[D] Force
29. Which of the following is the reason due to which the weight of an object at the poles is greater than at the equator?
[A] It is because of the shape of the earth[B] The attraction of the moon is maximum at the earth’s surface
[C] The attraction of the sun is maximum at the earth’s surface
[D] Gravitational pull is more at the poles
30. What will happen to the level of water if a toy boat in a tank sinks?
[A] Increase[B] Decrease
[C] Fluctuate
[D] Remain the same
31. What will be the weight of a body at the centre of the earth?
[A] half the weight at the surface[B] zero
[C] twice the weight at the surface
[D] infinite
32. Because of which of the following, a man standing close to the platform at a railway station experiences a pulling force towards a fast-moving train?
[A] gravitational force between train and man[B] illusion of the man
[C] the centripetal force
[D] pressure difference due to fast moving air in between
33. If there were no gravity, which of the following will not be there for a fluid?
[A] Viscosity[B] Surface Tension
[C] Pressure
[D] Upward Thrust
34. The motion of a freely falling body is an example of _______ accelerated motion.
[A] non-uniformly[B] uniformly
[C] uniquely
[D] specially
35. Oil rises up the wick in a lamp because__:
[A] Oil is very light[B] Of the diffusion of oil through the wick
[C] Of the surface tension phenomenon
[D] Of the capillary action phenomenon
36. Why does an oil drop spread over water?
[A] Oil is lighter than water[B] Oil is more viscous
[C] Oil does not mix with water
[D] Surface tension of oil is much smaller than that of water
37. Water is not suitable as a calorimetric substance because__:
[A] It has high specific heat[B] It is a good conductor
[C] It has a high boiling point
[D] It has low latent heat of vaporization
38. A liquid disturbed by stirring comes to rest due to__:
[A] Density[B] Surface Tension
[C] Viscosity
[D] Centripetal Force
39. When a body is immersed in a liquid, the force acting on it is__:
[A] Upthrust[B] Weight
[C] Mass
[D] Both
40. The unit of noise pollution (level) is :
[A] Decibel[B] Decimal
[C] ppm
[D] None of these
41. The distance-time graph for the motion of an object moving with a constant speed is a
[A] Dot[B] Circle
[C] Straight Line
[D] Curve
42. Lighthouses are placed with powerful lights to :
[A] guide and resolve traffic jams in crowded metro-cities during nights.[B] guide and help large crowds at religious gathering during nights.
[C] indicate to the incoming warships, the location of a harbour during night.
[D] guide and warn the ships coming from different directions in the ocean.
43. Which of the following criterion is used for any metal to be used as a cooking material ?
[A] More specific heat[B] More thermal conductivity
[C] Less thermal conductivity
[D] Less electrical conductivity
44. The product of force and the time for which the force acts on a body is equal to the change in ________ of the body.
[A] Acceleration[B] Torque
[C] Momentum
[D] Velocity
45. Which of the following is not caused by atmospheric refraction of light ?
[A] Sun appearing red at sunset[B] Twinkling of stars at night
[C] Sun appearing higher in the sky than it actually is
[D] Sun becoming visible two or three minutes before actual sunrise
46. The lens of the eye is behind the :
[A] Pupil[B] Vitreous humor
[C] Retina
[D] Optic nerve
47. The method of magnetisation is:
[A] Hammering a magnet[B] Heating a magnet
[C] Passing direct current through it
[D] Passing alternating current through it
48. Tesla is a unit of magnetic:
[A] Flux[B] Induction
[C] Moment
[D] Field
49. Which of the following statements are CORRECT?
Change in magnetic field produces induced current.
Flow of current in a conductor produces magnetic field.
Magnetic field related to coil can be produced by motion between conductor and coil.
Select the correct option from the codes given below:
[B] Only 2 & 3
[C] Only 1 & 3
[D] 1, 2 & 3
50. The component used for tuning a radio is basically a variable:
[A] Resistor[B] Condenser
[C] Inductor
[D] Transformer