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Physics MCQs

439 Questions Subject Test
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Which principle states that no two electrons in an atom can have the same set of four quantum numbers?

  • A Heisenberg Uncertainty Principle
  • B Superposition Principle
  • C Aufbau Principle
  • D Pauli Exclusion Principle
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Which of these has the highest specific heat capacity?

  • A Copper
  • B Aluminum
  • C Iron
  • D Water
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Which quantity remains unchanged when a transformer changes voltage in an ideal system?

  • A Power
  • B Current
  • C Resistance
  • D Frequency only
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Easy pms Uploaded: 17 Aug 2026

Total internal reflection occurs when light travels from a:

  • A Denser medium to a rarer medium at any angle
  • B Rarer medium to a denser medium
  • C Denser medium to a rarer medium at an angle greater than the critical angle
  • D Vacuum to a medium
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Medium css fpsc ppsc Uploaded: 13 Jul 2026

What is the SI unit of capacitance?

  • A Henry
  • B Farad
  • C Tesla
  • D Ohm
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Which law explains why objects float or sink in a fluid?

  • A Newton's Law
  • B Archimedes' Principle
  • C Pascal's Law
  • D Boyle's Law
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Easy nts Uploaded: 17 Aug 2026

The SI unit of temperature is:

  • A Celsius
  • B Kelvin
  • C Joule
  • D Fahrenheit
68
Medium fpsc Uploaded: 17 Aug 2026

The device used to measure potential difference in a circuit is called a:

  • A Voltmeter
  • B Galvanometer
  • C Wattmeter
  • D Ammeter
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Medium nts Uploaded: 17 Aug 2026

What is the SI unit of momentum?

  • A kg m/s^2
  • B J s
  • C kg m/s
  • D N/s
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Medium css fpsc ppsc Uploaded: 13 Jul 2026

Which scale of temperature is used in thermodynamic calculations and starts at absolute zero?

  • A Kelvin
  • B Celsius
  • C Fahrenheit
  • D Rankine
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Easy pms Uploaded: 06 Aug 2026

Which unit is used to express the wavelength of visible light?

  • A Nanometer
  • B Meter
  • C Kilometer
  • D Centimeter
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Medium pms Uploaded: 17 Aug 2026

In a transverse wave, particle motion is:

  • A Perpendicular to wave direction
  • B Parallel to wave direction
  • C Random
  • D Circular
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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
74
Medium fpsc ppsc nts Uploaded: 13 Jul 2026

What is the process by which a solid changes directly into a gas without passing through the liquid phase?

  • A Evaporation
  • B Sublimation
  • C Condensation
  • D Vaporisation
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Medium nts Uploaded: 17 Aug 2026

Which of the following best describes 'inertia'?

  • A Resistance to change in motion
  • B Ability to move
  • C Rate of change of velocity
  • D Force applied on a body
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Which of the following best describes nuclear fission?

  • A Combining light nuclei to form a heavier nucleus
  • B Emission of alpha particles
  • C Splitting of a heavy nucleus into lighter nuclei
  • D Absorption of neutrons without splitting
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Medium pms Uploaded: 06 Aug 2026

What is the term for the total kinetic and potential energy possessed by molecules within a substance?

  • A Heat
  • B Temperature
  • C Internal energy
  • D Specific heat
78
Hard fpsc Uploaded: 17 Aug 2026

Which of the following travels fastest in vacuum?

  • A Sound waves
  • B Light waves
  • C Seismic waves
  • D Water waves
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Medium css fpsc ppsc Uploaded: 13 Jul 2026

Which type of radiation consists of helium nuclei emitted from an unstable nucleus?

  • A Alpha radiation
  • B Beta radiation
  • C Gamma radiation
  • D Neutron radiation
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Medium nts Uploaded: 06 Aug 2026

Which scientist is credited with discovering the law of universal gravitation?

  • A Albert Einstein
  • B Galileo Galilei
  • C Isaac Newton
  • D Johannes Kepler
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