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FPSC MCQs

Federal Public Service Commission — Complete MCQ Bank

99 Questions
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91
Physics Medium

Which law states that the current through a conductor is directly proportional to the voltage across it?

  • AFaraday's Law
  • BOhm's Law
  • CKirchhoff's Law
  • DCoulomb's Law
Permalink
Correct Answer: Option B — Ohm's Law
Explanation: Ohm's Law states that the current I through a conductor is directly proportional to the voltage V across it at constant temperature expressed as V equals IR.
Submitted by: PaperMCQs
92
Physics Easy

What is the unit of electrical resistance?

  • AVolt
  • BAmpere
  • CWatt
  • DOhm
Permalink
Correct Answer: Option D — Ohm
Explanation: The Ohm named after German physicist Georg Simon Ohm is the SI unit of electrical resistance defined as the resistance that produces a potential difference of one volt per ampere.
Submitted by: PaperMCQs
93
Physics Easy

Which physical quantity is defined as force per unit area?

  • ADensity
  • BPressure
  • CStress
  • DTorque
Permalink
Correct Answer: Option B — Pressure
Explanation: Pressure is defined as force per unit area measured in Pascals in the SI system and applies to fluids and gases exerting force on surfaces equally in all directions.
Submitted by: PaperMCQs
94
Physics Medium

What is the approximate speed of sound in air at room temperature?

  • A343 m/s
  • B150 m/s
  • C1500 m/s
  • D3000 m/s
Permalink
Correct Answer: Option A — 343 m/s
Explanation: Sound travels at approximately 343 metres per second in air at room temperature of about 20 degrees Celsius and this speed increases with temperature.
Submitted by: PaperMCQs
95
Physics Medium

Which type of wave does not require a medium to travel?

  • ASound wave
  • BWater wave
  • CSeismic wave
  • DElectromagnetic wave
Permalink
Correct Answer: Option D — Electromagnetic wave
Explanation: Electromagnetic waves such as light radio waves and X-rays can travel through a vacuum without requiring a medium distinguishing them from mechanical waves like sound.
Submitted by: PaperMCQs
96
Physics Easy

What is the SI unit of electric current?

  • AVolt
  • BOhm
  • CAmpere
  • DWatt
Permalink
Correct Answer: Option C — Ampere
Explanation: The Ampere named after French physicist Andre-Marie Ampere is the SI base unit of electric current representing the flow of one coulomb of charge per second.
Submitted by: PaperMCQs
97
Physics Easy

Which law states that every action has an equal and opposite reaction?

  • ANewton's First Law
  • BNewton's Second Law
  • CNewton's Third Law
  • DLaw of Gravitation
Permalink
Correct Answer: Option C — Newton's Third Law
Explanation: Newton's Third Law states that for every action there is an equal and opposite reaction meaning forces always occur in pairs acting on different objects.
Submitted by: PaperMCQs
98
Physics Easy

What is the SI unit of force?

  • AWatt
  • BJoule
  • CPascal
  • DNewton
Permalink
Correct Answer: Option D — Newton
Explanation: The Newton named after Isaac Newton is the SI unit of force defined as the force needed to accelerate a mass of one kilogram at one metre per second squared.
Submitted by: PaperMCQs
99
Physics Easy

Which scientist is known as the Father of Physics?

  • AIsaac Newton
  • BAlbert Einstein
  • CGalileo Galilei
  • DArchimedes
Permalink
Correct Answer: Option C — Galileo Galilei
Explanation: Galileo Galilei is widely regarded as the Father of Physics for his pioneering experimental approach to the study of motion mechanics and astronomy in the 16th and 17th centuries.
Submitted by: PaperMCQs
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