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Physics MCQs

95 Questions Subject Test
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Practice core concepts of measurement, motion, force, energy, waves, electricity, magnetism and modern physics.

MechanicsWavesElectricityModern Physics
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61
Medium css fpsc ppsc Uploaded: 13 Jul 2026

Which formula correctly represents the relationship between frequency wavelength and speed of a wave?

  • A v equals f divided by wavelength
  • B v equals wavelength divided by f
  • C v equals f times wavelength
  • D f equals v times wavelength
62
Medium ppsc Uploaded: 17 Aug 2026

A scalar quantity has:

  • A Only magnitude
  • B Both magnitude and direction
  • C Neither magnitude nor direction
  • D Only direction
63
Medium css fpsc ppsc Uploaded: 13 Jul 2026

Which type of nuclear reaction splits a heavy nucleus into smaller nuclei releasing large amounts of energy?

  • A Nuclear fusion
  • B Radioactive decay
  • C Nuclear fission
  • D Beta decay
64
Medium ppsc Uploaded: 17 Aug 2026

Echo is caused by the:

  • A Refraction of sound
  • B Diffraction of sound
  • C Interference of sound
  • D Reflection of sound
65
Medium css fpsc ppsc Uploaded: 13 Jul 2026

Which law of thermodynamics states that energy cannot be created or destroyed only converted from one form to another?

  • A Zeroth Law
  • B Second Law
  • C Third Law
  • D First Law
66
Medium ppsc Uploaded: 06 Aug 2026

What is the term for the energy carried by a photon proportional to its frequency?

  • A Kinetic energy
  • B Potential energy
  • C Photon energy
  • D Binding energy
67
Medium css fpsc ppsc Uploaded: 13 Jul 2026

Which model of the atom describes electrons orbiting the nucleus in specific energy levels?

  • A Thomson's Plum Pudding model
  • B Rutherford's model
  • C Dalton's model
  • D Bohr's atomic model
68
Medium fpsc ppsc nts Uploaded: 13 Jul 2026

What is meant by the term inertia in physics?

  • A The tendency of an object to resist changes in its state of motion
  • B The tendency of an object to accelerate
  • C The force of gravity on an object
  • D The energy stored in a moving object
69
Medium ppsc Uploaded: 17 Aug 2026

The speed of sound in air at room temperature is approximately:

  • A 343 m/s
  • B 5000 m/s
  • C 3 x 10^8 m/s
  • D 1500 m/s
70
Medium fpsc ppsc nts Uploaded: 13 Jul 2026

Which device converts electrical energy into mechanical energy?

  • A Generator
  • B Transformer
  • C Electric motor
  • D Capacitor
71
Medium fpsc ppsc nts Uploaded: 13 Jul 2026

Which type of wave does not require a medium to travel?

  • A Sound wave
  • B Water wave
  • C Seismic wave
  • D Electromagnetic wave
72
Medium fpsc ppsc nts Uploaded: 05 Aug 2026

Which device converts light energy directly into electrical energy using the photovoltaic effect?

  • A Generator
  • B Transformer
  • C Solar cell
  • D Battery
73
Medium css fpsc ppsc Uploaded: 13 Jul 2026

What is the centripetal force?

  • A Force pushing an object outward in circular motion
  • B Force causing linear acceleration
  • C Force equal to mass times velocity
  • D Force directed toward the centre of circular motion
74
Medium ppsc Uploaded: 17 Aug 2026

The phenomenon of bending of light around obstacles is called:

  • A Refraction
  • B Diffraction
  • C Reflection
  • D Dispersion
75
Medium ppsc Uploaded: 17 Aug 2026

A collision in which kinetic energy is not conserved is called:

  • A Inelastic collision
  • B Elastic collision
  • C Momentum collision
  • D Perfectly elastic collision
76
Medium css fpsc ppsc Uploaded: 13 Jul 2026

What is the half-life of a radioactive substance?

  • A Time for the substance to completely decay
  • B Time for the radiation to halve in intensity only
  • C Time for half the nuclei to decay
  • D Time for temperature to reduce by half
77
Medium ppsc Uploaded: 17 Aug 2026

The boiling point of water on the Fahrenheit scale is:

  • A 100 degrees
  • B 212 degrees
  • C 32 degrees
  • D 373 degrees
78
Medium ppsc Uploaded: 06 Aug 2026

What is the value of absolute zero temperature in Celsius?

  • A -373°C
  • B -273.15°C
  • C -100°C
  • D 0°C
79
Medium ppsc Uploaded: 06 Aug 2026

Which quantity remains constant in an isolated system according to the law of conservation of momentum?

  • A Total momentum
  • B Total energy
  • C Total mass
  • D Total force
80
Medium css fpsc ppsc Uploaded: 13 Jul 2026

Which experiment demonstrated that light behaves as a wave by producing an interference pattern?

  • A Young's double slit experiment
  • B Rutherford's gold foil experiment
  • C Millikan's oil drop experiment
  • D Compton scattering experiment
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