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Physics MCQs

63 Questions
Subject Preparation Guide

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

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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
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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
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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
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A rectifier is used to convert:

  • A Current to resistance
  • B Voltage to current
  • C DC to AC
  • D AC to DC
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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
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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
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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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Who explained the photoelectric effect and won the Nobel Prize for it in 1921?

  • A Albert Einstein
  • B Max Planck
  • C Niels Bohr
  • D Ernest Rutherford
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Which principle explains why an aircraft wing generates lift?

  • A Pascal's principle
  • B Bernoulli's principle
  • C Archimedes' principle
  • D Newton's first law only
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What happens to the kinetic energy of a body when its velocity is doubled?

  • A Triples
  • B Doubles
  • C Becomes four times
  • D Remains the same
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Which scientist developed the theory of general relativity extending special relativity to include gravity?

  • A Isaac Newton
  • B Albert Einstein
  • C Niels Bohr
  • D Max Planck
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What is the Doppler effect in the context of sound waves?

  • A Change in speed of sound due to medium
  • B Change in amplitude of sound near a source
  • C Echo formation from hard surfaces
  • D Apparent change in frequency due to relative motion between source and observer
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What is simple harmonic motion?

  • A Motion in a circle at constant speed
  • B Oscillatory motion where restoring force is proportional to displacement
  • C Uniform linear motion
  • D Random motion under multiple forces
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Sublimation refers to the direct change of state from:

  • A Gas to liquid
  • B Solid to gas
  • C Solid to liquid
  • D Liquid to gas
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The electron was discovered by:

  • A Niels Bohr
  • B J.J. Thomson
  • C James Chadwick
  • D Ernest Rutherford
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Which lens is used to correct myopia (nearsightedness)?

  • A Bifocal lens
  • B Convex lens
  • C Concave lens
  • D Cylindrical lens
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What is the process by which an unstable atomic nucleus spontaneously emits radiation?

  • A Fission
  • B Fusion
  • C Diffraction
  • D Radioactive decay
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Which scientist discovered electromagnetic induction demonstrating that a changing magnetic field induces current?

  • A Michael Faraday
  • B James Clerk Maxwell
  • C Nikola Tesla
  • D Heinrich Hertz
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What phenomenon explains why the sky appears blue?

  • A Total internal reflection
  • B Reflection
  • C Refraction
  • D Rayleigh scattering
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Myopia occurs when the eyeball is:

  • A Too short
  • B Too long
  • C Perfectly spherical
  • D Normal in length