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FPSC MCQs

Federal Public Service Commission — Complete MCQ Bank

99 Questions
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61
Physics Hard

What is the SI unit of inductance?

  • AFarad
  • BTesla
  • CWeber
  • DHenry
Permalink
Correct Answer: Option D — Henry
Explanation: The Henry is the SI unit of inductance named after American scientist Joseph Henry defined as the inductance that produces an EMF of one volt when current changes at one ampere per second.
Submitted by: PaperMCQs
62
Physics Medium

What is the SI unit of capacitance?

  • AHenry
  • BFarad
  • CTesla
  • DOhm
Permalink
Correct Answer: Option B — Farad
Explanation: The Farad is the SI unit of capacitance named after Michael Faraday defined as the capacitance of a capacitor that stores one coulomb of charge at one volt potential difference.
Submitted by: PaperMCQs
63
Physics Medium

Which law relates the force between two electric charges to the distance between them?

  • AOhm's Law
  • BCoulomb's Law
  • CFaraday's Law
  • DAmpere's Law
Permalink
Correct Answer: Option B — Coulomb's Law
Explanation: Coulomb's Law states that the electrostatic force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.
Submitted by: PaperMCQs
64
Physics Medium

What is the SI unit of electric charge?

  • ACoulomb
  • BAmpere
  • CVolt
  • DFarad
Permalink
Correct Answer: Option A — Coulomb
Explanation: The Coulomb is the SI unit of electric charge defined as the quantity of electricity transported in one second by a current of one ampere.
Submitted by: PaperMCQs
65
Physics Medium

Which type of nuclear reaction combines light nuclei to form a heavier nucleus releasing energy?

  • ANuclear fusion
  • BNuclear fission
  • CRadioactive decay
  • DAlpha decay
Permalink
Correct Answer: Option A — Nuclear fusion
Explanation: Nuclear fusion combines light nuclei such as hydrogen isotopes to form heavier nuclei releasing vast amounts of energy and is the process powering the sun and hydrogen bombs.
Submitted by: PaperMCQs
66
Physics Medium

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

  • ANuclear fusion
  • BRadioactive decay
  • CNuclear fission
  • DBeta decay
Permalink
Correct Answer: Option C — Nuclear fission
Explanation: Nuclear fission splits a heavy nucleus such as uranium-235 into smaller nuclei releasing enormous amounts of energy and is the principle behind nuclear power plants and atomic bombs.
Submitted by: PaperMCQs
67
Physics Medium

What is the process by which an unstable atomic nucleus spontaneously emits radiation?

  • AFission
  • BFusion
  • CDiffraction
  • DRadioactive decay
Permalink
Correct Answer: Option D — Radioactive decay
Explanation: Radioactive decay is the spontaneous emission of radiation from an unstable atomic nucleus as it transforms into a more stable configuration releasing alpha beta or gamma radiation.
Submitted by: PaperMCQs
68
Physics Easy

Which particle in an atom has no electric charge?

  • AProton
  • BElectron
  • CNeutron
  • DPhoton
Permalink
Correct Answer: Option C — Neutron
Explanation: Neutrons are electrically neutral subatomic particles found in the nucleus of an atom alongside protons and their presence affects the mass and stability of the nucleus.
Submitted by: PaperMCQs
69
Physics Easy

Which particle carries a positive electric charge in an atom?

  • AElectron
  • BNeutron
  • CProton
  • DPhoton
Permalink
Correct Answer: Option C — Proton
Explanation: Protons are positively charged subatomic particles located in the nucleus of an atom with a charge equal in magnitude but opposite in sign to that of an electron.
Submitted by: PaperMCQs
70
Physics Easy

Which particle carries a negative electric charge in an atom?

  • AProton
  • BElectron
  • CNeutron
  • DNucleus
Permalink
Correct Answer: Option B — Electron
Explanation: Electrons are subatomic particles carrying a negative electric charge of 1.6 x 10 to the power of minus 19 coulombs and orbit the nucleus of an atom.
Submitted by: PaperMCQs
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