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Physics MCQs

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221
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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Correct Answer: Option A — Perpendicular to wave direction
Explanation: In a transverse wave, the particles of the medium vibrate perpendicular to the direction in which the wave itself travels, as seen in waves on a string or electromagnetic waves like light.
Submitted by: PaperMCQs
222
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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Correct Answer: Option B — Sublimation
Explanation: Sublimation is the direct phase transition from solid to gas without passing through the liquid state as demonstrated by dry ice converting to carbon dioxide gas.
Submitted by: PaperMCQs
223
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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Correct Answer: Option A — Resistance to change in motion
Explanation: Inertia is the inherent property of matter that causes it to resist any change in its state of rest or motion, and it is directly proportional to the mass of the object.
Submitted by: PaperMCQs
224
Medium css Uploaded: 06 Aug 2026

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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Correct Answer: Option C — Splitting of a heavy nucleus into lighter nuclei
Explanation: Nuclear fission is the process where a heavy atomic nucleus splits into two or more lighter nuclei, releasing a substantial amount of energy. This process powers nuclear reactors and was famously used in atomic bombs during World War II.
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225
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
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Correct Answer: Option C — Internal energy
Explanation: Internal energy represents the sum total of kinetic and potential energy possessed by all the particles within a substance, arising from their random motion and intermolecular interactions, distinct from the substance's overall temperature reading.
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226
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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Correct Answer: Option A — Alpha radiation
Explanation: Alpha radiation consists of particles identical to helium-4 nuclei containing two protons and two neutrons emitted from heavy unstable nuclei during radioactive decay.
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227
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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Correct Answer: Option C — Isaac Newton
Explanation: Isaac Newton formulated the law of universal gravitation, stating that every mass attracts every other mass with a force proportional to their masses and inversely proportional to the square of the distance between them.
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228
Medium fpsc Uploaded: 17 Aug 2026

A fuse in an electrical circuit is used to:

  • A Protect the circuit from excessive current
  • B Store electrical energy
  • C Increase voltage
  • D Convert AC to DC
Permalink
Correct Answer: Option A — Protect the circuit from excessive current
Explanation: A fuse is a safety device containing a thin wire that melts and breaks the circuit when current exceeds a safe limit, protecting household wiring and appliances from damage due to overloading.
Submitted by: PaperMCQs
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