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Physics MCQs

118 Questions Subject Test
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Practice core concepts of measurement, motion, force, energy, waves, electricity, magnetism and modern physics.

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81
Medium nts Uploaded: 17 Aug 2026

The specific heat capacity of water is approximately:

  • A 2 cal/g degree C
  • B 1 cal/g degree C
  • C 0.1 cal/g degree C
  • D 0.5 cal/g degree C
Permalink
Correct Answer: Option B — 1 cal/g degree C
Explanation: Water has a specific heat capacity of approximately 1 calorie per gram per degree Celsius, which is relatively high compared to most substances, allowing it to absorb or release large amounts of heat.
Submitted by: PaperMCQs
82
Medium nts Uploaded: 17 Aug 2026

The SI unit of magnetic flux is:

  • A Tesla
  • B Farad
  • C Weber
  • D Henry
Permalink
Correct Answer: Option C — Weber
Explanation: Magnetic flux, which represents the total magnetic field passing through a given area, is measured in Weber (Wb) in the SI system, named after German physicist Wilhelm Eduard Weber.
Submitted by: PaperMCQs
83
Easy nts Uploaded: 17 Aug 2026

Torque is the rotational equivalent of which linear quantity?

  • A Velocity
  • B Force
  • C Momentum
  • D Acceleration
Permalink
Correct Answer: Option B — Force
Explanation: Torque is the rotational analogue of force in linear motion; it is calculated as the product of force and the perpendicular distance from the axis of rotation, causing angular acceleration in a body.
Submitted by: PaperMCQs
84
Easy fpsc ppsc nts Uploaded: 13 Jul 2026

Which device is used to measure the electric current flowing through a circuit?

  • A Voltmeter
  • B Ohmmeter
  • C Galvanometer
  • D Ammeter
Permalink
Correct Answer: Option D — Ammeter
Explanation: An ammeter is connected in series in a circuit to measure the electric current flowing through it and is designed with very low internal resistance to minimise circuit disturbance.
Submitted by: PaperMCQs
85
Medium fpsc ppsc nts Uploaded: 13 Jul 2026

Which scientist formulated the law of universal gravitation?

  • A Galileo Galilei
  • B Isaac Newton
  • C Michael Faraday
  • D James Clerk Maxwell
Permalink
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
86
Medium nts Uploaded: 17 Aug 2026

The quantum of light energy is called a:

  • A Electron
  • B Photon
  • C Proton
  • D Neutron
Permalink
Correct Answer: Option B — Photon
Explanation: A photon is the fundamental quantum, or discrete packet, of electromagnetic radiation, including visible light, and it carries energy proportional to its frequency according to Planck's quantum theory.
Submitted by: PaperMCQs
87
Easy fpsc ppsc nts Uploaded: 13 Jul 2026

What is the SI unit of force?

  • A Watt
  • B Joule
  • C Pascal
  • D Newton
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
88
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
89
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
90
Easy nts Uploaded: 06 Aug 2026

Which law of thermodynamics states that energy cannot be created or destroyed?

  • A Zeroth Law
  • B Second Law
  • C First Law
  • D Third Law
Permalink
Correct Answer: Option C — First Law
Explanation: The First Law of Thermodynamics, also known as the law of conservation of energy, states that energy cannot be created or destroyed but only transformed from one form to another within an isolated system.
Submitted by: PaperMCQs
91
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
92
Easy fpsc ppsc nts Uploaded: 13 Jul 2026

What is the SI unit of frequency?

  • A Watt
  • B Newton
  • C Pascal
  • D Hertz
Permalink
Correct Answer: Option D — Hertz
Explanation: Hertz is the SI unit of frequency representing the number of cycles or oscillations per second and is named after German physicist Heinrich Hertz.
Submitted by: PaperMCQs
93
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
94
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
95
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
96
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.
Submitted by: PaperMCQs
97
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.
Submitted by: PaperMCQs
98
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.
Submitted by: PaperMCQs
99
Easy fpsc ppsc nts Uploaded: 13 Jul 2026

Which physical quantity is defined as force per unit area?

  • A Density
  • B Pressure
  • C Stress
  • D Torque
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
100
Medium fpsc ppsc nts Uploaded: 05 Aug 2026

Which phenomenon allows optical fibres to transmit light signals over long distances?

  • A Total internal reflection
  • B Refraction
  • C Diffraction
  • D Dispersion
Permalink
Correct Answer: Option A — Total internal reflection
Explanation: Total internal reflection occurs when light travelling in a dense medium hits the boundary at an angle greater than the critical angle causing all light to reflect back inside the fibre.
Submitted by: PaperMCQs
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