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PPSC MCQs

Punjab Public Service Commission — Complete MCQ Bank

86 Questions
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How to prepare for PPSC

PPSC examinations recruit candidates for Punjab government departments and commonly test general knowledge, current affairs, English and post-related subjects.

Punjab AffairsGeneral KnowledgeCurrent AffairsEnglish
Give special attention to Punjab geography, history and administration alongside the advertised post’s specialist syllabus.
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All Subjects Biology Chemistry Computer Science Current Affairs English Everyday Science General Knowledge Islamic Studies Mathematics Pakistan Studies Physics
1
Physics Medium

Which instrument is used to detect and measure very small electric currents?

  • AVoltmeter
  • BOhmmeter
  • CAmmeter
  • DGalvanometer
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Correct Answer: Option D — Galvanometer
Explanation: A galvanometer is a sensitive instrument used to detect and measure very small electric currents through the deflection of a needle in a magnetic field.
Submitted by: PaperMCQs
2
Physics Medium

What is the function of an optical fibre?

  • ATo store electrical energy
  • BTo transmit light signals over long distances using total internal reflection
  • CTo measure temperature
  • DTo amplify sound waves
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Correct Answer: Option B — To transmit light signals over long distances using total internal reflection
Explanation: Optical fibres transmit light signals over long distances using total internal reflection within a glass or plastic fibre and are the backbone of modern high-speed internet communications.
Submitted by: PaperMCQs
3
Physics Hard

What is the name of the force that holds protons and neutrons together inside the nucleus?

  • AElectromagnetic force
  • BGravitational force
  • CStrong nuclear force
  • DWeak nuclear force
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Correct Answer: Option C — Strong nuclear force
Explanation: The strong nuclear force holds protons and neutrons together inside the atomic nucleus and is the strongest of the four fundamental forces operating only at very short ranges.
Submitted by: PaperMCQs
4
Physics Medium

Which law states that planets move in elliptical orbits with the sun at one focus?

  • ANewton's Law of Gravitation
  • BGalileo's Law of Motion
  • CKepler's First Law
  • DHubble's Law
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Correct Answer: Option C — Kepler's First Law
Explanation: Kepler's First Law of Planetary Motion states that all planets orbit the sun in elliptical paths with the sun located at one of the two foci of the ellipse.
Submitted by: PaperMCQs
5
Physics Medium

What is the centripetal force?

  • AForce pushing an object outward in circular motion
  • BForce causing linear acceleration
  • CForce equal to mass times velocity
  • DForce directed toward the centre of circular motion
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Correct Answer: Option D — Force directed toward the centre of circular motion
Explanation: Centripetal force is the force directed toward the centre of circular motion that keeps an object moving in a curved path and is provided by tension gravity or friction depending on the situation.
Submitted by: PaperMCQs
6
Physics Medium

What is the terminal velocity of a falling object?

  • AMinimum speed during fall
  • BSpeed at which object first starts moving
  • CSpeed independent of mass
  • DMaximum speed reached when weight equals air resistance
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Correct Answer: Option D — Maximum speed reached when weight equals air resistance
Explanation: Terminal velocity is the constant maximum speed reached by a falling object when the downward gravitational force equals the upward air resistance force resulting in zero net force.
Submitted by: PaperMCQs
7
Physics Hard

Which type of spectrum consists of specific discrete wavelengths emitted by excited atoms?

  • AContinuous spectrum
  • BLine emission spectrum
  • CAbsorption spectrum
  • DBand spectrum
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Correct Answer: Option B — Line emission spectrum
Explanation: A line emission spectrum consists of discrete bright lines at specific wavelengths produced when electrons in excited atoms fall to lower energy levels releasing photons of specific energies.
Submitted by: PaperMCQs
8
Physics Easy

Which process transfers heat through the movement of fluid currents?

  • AConvection
  • BConduction
  • CRadiation
  • DSublimation
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Correct Answer: Option A — Convection
Explanation: Convection transfers heat through the movement of fluids as warmer less dense fluid rises and cooler denser fluid sinks creating convection currents that distribute thermal energy.
Submitted by: PaperMCQs
9
Physics Hard

What is the phenomenon of resonance in physics?

  • AIncrease in amplitude when driving frequency matches natural frequency
  • BDecrease in amplitude of oscillations over time
  • CThe bending of waves around obstacles
  • DSplitting of white light into colours
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Correct Answer: Option A — Increase in amplitude when driving frequency matches natural frequency
Explanation: Resonance occurs when a system is driven at its natural frequency causing the amplitude of oscillations to increase dramatically and can be seen in musical instruments and bridges.
Submitted by: PaperMCQs
10
Physics Hard

Which type of mirror is used in reflecting telescopes?

  • APlane mirror
  • BParabolic concave mirror
  • CConvex mirror
  • DCylindrical mirror
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Correct Answer: Option B — Parabolic concave mirror
Explanation: Reflecting telescopes use parabolic concave mirrors to collect and focus parallel rays of light from distant stars to a single focal point without chromatic aberration.
Submitted by: PaperMCQs
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