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Physics MCQs

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161
Medium fpsc ppsc nts Uploaded: 13 Jul 2026

What is the SI unit of electric charge?

  • A Coulomb
  • B Ampere
  • C Volt
  • D Farad
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
162
Medium nts Uploaded: 17 Aug 2026

Pascal's principle states that pressure applied to a confined fluid is:

  • A Only felt at the point of application
  • B Lost as heat
  • C Transmitted equally in all directions
  • D Absorbed by the container
Permalink
Correct Answer: Option C — Transmitted equally in all directions
Explanation: Pascal's principle states that pressure applied at any point in a confined, incompressible fluid is transmitted undiminished and equally throughout the entire fluid in all directions, forming the basis of hydraulic systems.
Submitted by: PaperMCQs
163
Medium pms Uploaded: 17 Aug 2026

The rate of change of momentum of a body is directly proportional to the applied force. This is a statement of:

  • A Law of conservation of momentum
  • B Newton's second law
  • C Newton's third law
  • D Newton's first law
Permalink
Correct Answer: Option B — Newton's second law
Explanation: Newton's second law states that force equals the rate of change of momentum, mathematically expressed as F = ma when mass remains constant, linking force, mass and acceleration.
Submitted by: PaperMCQs
164
Medium nts Uploaded: 17 Aug 2026

The range of audible frequencies for a normal human ear is approximately:

  • A 20,000 Hz to 200,000 Hz
  • B 200 Hz to 200,000 Hz
  • C 2 Hz to 2,000 Hz
  • D 20 Hz to 20,000 Hz
Permalink
Correct Answer: Option D — 20 Hz to 20,000 Hz
Explanation: The typical range of human hearing spans from about 20 Hz to 20,000 Hz, though this range often narrows with age; frequencies above this range are termed ultrasonic and below are infrasonic.
Submitted by: PaperMCQs
165
Medium nts Uploaded: 17 Aug 2026

A ball rolling on a frictionless horizontal surface will:

  • A Speed up continuously
  • B Move in a circular path
  • C Slow down and stop
  • D Continue moving at constant velocity
Permalink
Correct Answer: Option D — Continue moving at constant velocity
Explanation: On a perfectly frictionless horizontal surface, no external horizontal force acts on the ball, so according to Newton's first law it continues moving indefinitely at a constant velocity in a straight line.
Submitted by: PaperMCQs
166
Medium fpsc ppsc nts Uploaded: 05 Aug 2026

Which type of wave requires no medium and can travel through a vacuum at the speed of light?

  • A Sound wave
  • B Electromagnetic wave
  • C Water wave
  • D Seismic wave
Permalink
Correct Answer: Option B — Electromagnetic wave
Explanation: Electromagnetic waves including light radio waves X-rays and gamma rays do not require a medium and travel through a vacuum at approximately 300000 kilometres per second.
Submitted by: PaperMCQs
167
Medium fpsc Uploaded: 06 Aug 2026

Which scientist formulated the three laws of planetary motion?

  • A Galileo Galilei
  • B Nicolaus Copernicus
  • C Isaac Newton
  • D Johannes Kepler
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Correct Answer: Option D — Johannes Kepler
Explanation: Johannes Kepler formulated the three laws of planetary motion in the early 17th century, describing how planets move in elliptical orbits around the sun. His laws laid crucial groundwork later used by Newton to develop the law of universal gravitation.
Submitted by: PaperMCQs
168
Medium nts Uploaded: 06 Aug 2026

What is the term for the change in momentum of an object caused by an applied force over time?

  • A Impulse
  • B Torque
  • C Work
  • D Power
Permalink
Correct Answer: Option A — Impulse
Explanation: Impulse represents the change in momentum an object experiences when a force acts upon it over a specific period of time, calculated by multiplying force by the duration of its application during the interaction.
Submitted by: PaperMCQs
169
Medium css fpsc ppsc Uploaded: 13 Jul 2026

What is the Doppler effect in the context of sound waves?

  • A Change in speed of sound due to medium
  • B Change in amplitude of sound near a source
  • C Echo formation from hard surfaces
  • D Apparent change in frequency due to relative motion between source and observer
Permalink
Correct Answer: Option D — Apparent change in frequency due to relative motion between source and observer
Explanation: The Doppler effect describes the apparent change in frequency of sound or light when the source and observer are in relative motion with frequency increasing as they approach and decreasing as they move apart.
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170
Medium pms Uploaded: 06 Aug 2026

What is the term for the point around which an object rotates?

  • A Axis
  • B Center of mass
  • C Fulcrum
  • D Pivot point
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Correct Answer: Option A — Axis
Explanation: The axis of rotation is the imaginary line around which an object rotates or spins. Understanding rotational axes is essential for analyzing angular motion, torque, and the mechanics of rotating systems like wheels and planets.
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171
Medium ppsc Uploaded: 17 Aug 2026

Which process occurs at constant volume?

  • A Adiabatic process
  • B Isobaric process
  • C Isothermal process
  • D Isochoric process
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Correct Answer: Option D — Isochoric process
Explanation: An isochoric process is a thermodynamic process that takes place at constant volume, meaning no work is done by or on the gas since work requires a change in volume during expansion or compression.
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172
Medium fpsc Uploaded: 17 Aug 2026

Static electricity is generated by:

  • A Magnetic induction
  • B Friction between two objects causing charge transfer
  • C Chemical reactions in a battery
  • D Flow of current in a wire
Permalink
Correct Answer: Option B — Friction between two objects causing charge transfer
Explanation: Static electricity is typically generated through the process of friction, where electrons are transferred between two objects rubbed together, leaving one object with a net positive and the other a net negative charge.
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173
Medium fpsc Uploaded: 17 Aug 2026

The SI unit of pressure is:

  • A Newton
  • B Watt
  • C Pascal
  • D Joule
Permalink
Correct Answer: Option C — Pascal
Explanation: Pressure is defined as force per unit area and its SI unit is the Pascal (Pa), equivalent to one Newton per square metre, used to measure fluid pressure, atmospheric pressure, and stress in materials.
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174
Medium fpsc ppsc nts Uploaded: 13 Jul 2026

What is the relationship between work done and force in the direction of displacement?

  • A Work equals force times displacement
  • B Work equals force plus displacement
  • C Work equals force times time
  • D Work equals force divided by displacement
Permalink
Correct Answer: Option A — Work equals force times displacement
Explanation: Work done is defined as the force applied multiplied by the displacement in the direction of that force expressed as W equals Fd where both force and displacement must be in the same direction.
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175
Medium pms Uploaded: 06 Aug 2026

Which law states that pressure and volume of a gas are inversely proportional at constant temperature?

  • A Gay-Lussac's Law
  • B Charles's Law
  • C Avogadro's Law
  • D Boyle's Law
Permalink
Correct Answer: Option D — Boyle's Law
Explanation: Boyle's Law states that at constant temperature, the pressure of a fixed amount of gas is inversely proportional to its volume. This means as volume decreases, pressure increases proportionally, a fundamental principle in thermodynamics and gas behavior studies.
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176
Medium pms Uploaded: 17 Aug 2026

The speed of light in vacuum is approximately:

  • A 3 x 10^8 m/s
  • B 3 x 10^10 m/s
  • C 3 x 10^6 m/s
  • D 3 x 10^5 m/s
Permalink
Correct Answer: Option A — 3 x 10^8 m/s
Explanation: The speed of light in a vacuum is a fundamental physical constant, approximately equal to 3 x 10^8 metres per second, and it represents the maximum speed at which information can travel.
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177
Medium pms Uploaded: 17 Aug 2026

An n-type semiconductor has an excess of:

  • A Protons
  • B Holes
  • C Electrons
  • D Neutrons
Permalink
Correct Answer: Option C — Electrons
Explanation: An n-type semiconductor is created by doping a pure semiconductor with donor impurities that contribute extra free electrons, resulting in a material where electrons are the majority charge carriers.
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178
Medium nts Uploaded: 06 Aug 2026

What is the unit used to measure electrical resistance?

  • A Ohm
  • B Ampere
  • C Volt
  • D Watt
Permalink
Correct Answer: Option A — Ohm
Explanation: Electrical resistance is measured in Ohms, named after German physicist Georg Ohm. Resistance opposes the flow of electric current in a conductor, and Ohm's Law relates voltage, current, and resistance in a circuit.
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179
Medium nts Uploaded: 17 Aug 2026

The phenomenon of generating an electromotive force due to a changing magnetic field is called:

  • A Electrostatic induction
  • B Magnetic saturation
  • C Electromagnetic induction
  • D Electrolysis
Permalink
Correct Answer: Option C — Electromagnetic induction
Explanation: Electromagnetic induction, discovered by Michael Faraday, is the process by which a changing magnetic field induces an electromotive force and current in a nearby conductor, forming the basis of generators.
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180
Medium css fpsc ppsc Uploaded: 13 Jul 2026

What is simple harmonic motion?

  • A Motion in a circle at constant speed
  • B Oscillatory motion where restoring force is proportional to displacement
  • C Uniform linear motion
  • D Random motion under multiple forces
Permalink
Correct Answer: Option B — Oscillatory motion where restoring force is proportional to displacement
Explanation: Simple harmonic motion is a type of oscillatory motion where the restoring force is directly proportional to the displacement from equilibrium and directed toward the equilibrium position.
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