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FPSC MCQs

Federal Public Service Commission — Complete MCQ Bank

1,461 Questions
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FPSC recruitment tests assess subject knowledge, general ability and job-related competence for federal government positions across Pakistan.

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Read the official syllabus first, then combine subject-specific revision with timed mixed-question practice.
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361
Physics Easy

Which particle carries a negative electric charge in an atom?

  • AProton
  • BElectron
  • CNeutron
  • DNucleus
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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
362
Physics Hard

What is the unit of magnetic flux density?

  • ATesla
  • BWeber
  • CHenry
  • DFarad
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Correct Answer: Option A — Tesla
Explanation: Tesla is the SI unit of magnetic flux density or magnetic field strength representing one weber of magnetic flux per square metre.
Submitted by: PaperMCQs
363
Physics Hard

Which phenomenon explains the formation of mirages in deserts?

  • AReflection of light
  • BDiffraction of light
  • CTotal internal reflection due to air density layers
  • DDispersion of light
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Correct Answer: Option C — Total internal reflection due to air density layers
Explanation: Mirages form due to total internal reflection when light rays from the sky refract through layers of air with varying temperature and density creating the illusion of water on the ground.
Submitted by: PaperMCQs
364
Physics Hard

What is the angle of incidence when a ray of light undergoes total internal reflection?

  • ALess than the critical angle
  • BEqual to 90 degrees
  • CGreater than the critical angle
  • DEqual to 45 degrees
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Correct Answer: Option C — Greater than the critical angle
Explanation: Total internal reflection occurs when light travels from a denser to a rarer medium and the angle of incidence exceeds the critical angle causing all light to be reflected back.
Submitted by: PaperMCQs
365
Physics Medium

Which device converts electrical energy into mechanical energy?

  • AGenerator
  • BTransformer
  • CElectric motor
  • DCapacitor
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Correct Answer: Option C — Electric motor
Explanation: An electric motor converts electrical energy into mechanical energy using the interaction between electric current and a magnetic field to produce rotational motion.
Submitted by: PaperMCQs
366
Physics Medium

Which device converts mechanical energy into electrical energy?

  • AMotor
  • BTransformer
  • CGenerator
  • DBattery
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Correct Answer: Option C — Generator
Explanation: A generator converts mechanical energy into electrical energy through electromagnetic induction as a rotating coil moves within a magnetic field inducing an electric current.
Submitted by: PaperMCQs
367
Physics Easy

What is the acceleration due to gravity at the surface of the Earth?

  • A8.9 m/s squared
  • B10.8 m/s squared
  • C9.8 m/s squared
  • D7.8 m/s squared
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Correct Answer: Option C — 9.8 m/s squared
Explanation: The standard acceleration due to gravity at the Earth's surface is approximately 9.8 metres per second squared commonly rounded to 10 m/s squared in simple calculations.
Submitted by: PaperMCQs
368
Physics Medium

Which scientist formulated the law of universal gravitation?

  • AGalileo Galilei
  • BIsaac Newton
  • CMichael Faraday
  • DJames Clerk Maxwell
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Correct Answer: Option B — Isaac Newton
Explanation: Isaac Newton formulated the law of universal gravitation in 1687 stating that every mass attracts every other mass with a force proportional to their masses and inversely proportional to the square of the distance.
Submitted by: PaperMCQs
369
Physics Medium

What is the formula for gravitational potential energy?

  • Ahalf mv squared
  • Bmgh
  • CFxd
  • Dmv
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Correct Answer: Option B — mgh
Explanation: Gravitational potential energy is calculated as mass multiplied by gravitational acceleration multiplied by height expressed as PE equals mgh where g is approximately 9.8 m/s squared.
Submitted by: PaperMCQs
370
Physics Medium

What is the formula for kinetic energy?

  • Amv
  • Bmgh
  • Chalf mv squared
  • DFxd
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Correct Answer: Option C — half mv squared
Explanation: Kinetic energy is calculated using the formula KE equals half multiplied by mass multiplied by velocity squared showing that kinetic energy increases with the square of speed.
Submitted by: PaperMCQs
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