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Physics MCQs

125 Questions Subject Test
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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21
Easy pms Uploaded: 17 Aug 2026

The half-life of a radioactive substance is the time taken for:

  • A All of it to decay
  • B One-fourth of it to decay
  • C Half of it to decay
  • D None of it to decay
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Which law relates force, mass, and acceleration?

  • A Newton's First Law
  • B Newton's Second Law
  • C Newton's Third Law
  • D Law of Gravitation
23
Easy fpsc ppsc nts Uploaded: 13 Jul 2026

Which particle carries a negative electric charge in an atom?

  • A Proton
  • B Electron
  • C Neutron
  • D Nucleus
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What is the term for the bending of light as it passes from one medium to another?

  • A Reflection
  • B Diffraction
  • C Dispersion
  • D Refraction
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Lenz's law is a consequence of the conservation of:

  • A Mass
  • B Energy
  • C Momentum
  • D Charge
26
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Which law states that current flowing through a conductor is directly proportional to the voltage across it?

  • A Faraday's Law
  • B Kirchhoff's Law
  • C Lenz's Law
  • D Ohm's Law
27
Easy fpsc Uploaded: 17 Aug 2026

Which of the following is a good conductor of electricity?

  • A Glass
  • B Wood
  • C Copper
  • D Plastic
28
Easy fpsc ppsc nts Uploaded: 13 Jul 2026

Which device is used to measure the potential difference between two points in a circuit?

  • A Ammeter
  • B Voltmeter
  • C Galvanometer
  • D Ohmmeter
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What is the SI unit of power?

  • A Newton
  • B Pascal
  • C Watt
  • D Joule
30
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A diode allows current to flow in:

  • A A direction determined by voltage frequency
  • B Neither direction
  • C Both directions equally
  • D Only one direction
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Easy nts Uploaded: 06 Aug 2026

What is the term for an object floating due to the upward force of a fluid?

  • A Gravity
  • B Buoyancy
  • C Tension
  • D Friction
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Which scientist is known as the Father of Physics?

  • A Isaac Newton
  • B Albert Einstein
  • C Galileo Galilei
  • D Archimedes
33
Easy nts Uploaded: 17 Aug 2026

The law of conservation of linear momentum applies to a system when:

  • A Mass is constant only
  • B External force is maximum
  • C External force is zero
  • D Internal forces are zero
34
Easy fpsc ppsc nts Uploaded: 13 Jul 2026

Which process transfers heat through the movement of fluid currents?

  • A Convection
  • B Conduction
  • C Radiation
  • D Sublimation
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What is the term for the force per unit area exerted on a surface?

  • A Force
  • B Energy
  • C Work
  • D Pressure
36
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Which of Newton's laws explains the concept of inertia?

  • A Law of gravitation
  • B Third law
  • C Second law
  • D First law
37
Easy nts Uploaded: 17 Aug 2026

The process by which two light nuclei combine to form a heavier nucleus is called:

  • A Nuclear fission
  • B Nuclear fusion
  • C Alpha decay
  • D Radioactive decay
38
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The work-energy theorem states that the work done on a body equals its:

  • A Change in momentum
  • B Change in potential energy
  • C Change in kinetic energy
  • D Total mechanical energy
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Which law relates the pressure and volume of a gas at constant temperature?

  • A Charles's Law
  • B Boyle's Law
  • C Gay-Lussac's Law
  • D Avogadro's Law
40
Easy nts Uploaded: 17 Aug 2026

The zeroth law of thermodynamics deals with:

  • A Entropy
  • B Conservation of energy
  • C Thermal equilibrium
  • D Absolute zero
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