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Physics MCQs

125 Questions Subject Test
Subject Preparation Guide

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

MechanicsWavesElectricityModern Physics
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81
Easy fpsc ppsc nts Uploaded: 13 Jul 2026

What type of lens is thicker at the centre than at the edges?

  • A Concave lens
  • B Plano-concave lens
  • C Biconcave lens
  • D Convex lens
Permalink
Correct Answer: Option D — Convex lens
Explanation: A convex lens also called a converging lens is thicker at the centre than at the edges and brings parallel rays of light to a focus at a point called the focal point.
Submitted by: PaperMCQs
82
Easy css Uploaded: 06 Aug 2026

What is the term for a material that allows electric current to pass through easily?

  • A Insulator
  • B Conductor
  • C Semiconductor
  • D Superconductor
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Correct Answer: Option B — Conductor
Explanation: Conductors, such as copper and aluminum, allow electric current to flow easily due to the presence of free electrons that can move through the material. They are widely used in electrical wiring and circuits.
Submitted by: PaperMCQs
83
Easy fpsc ppsc nts Uploaded: 13 Jul 2026

What is the SI unit of pressure?

  • A Newton
  • B Joule
  • C Pascal
  • D Watt
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Correct Answer: Option C — Pascal
Explanation: The Pascal is the SI unit of pressure named after Blaise Pascal and defined as one Newton of force per square metre of area.
Submitted by: PaperMCQs
84
Easy nts Uploaded: 17 Aug 2026

The bending of light as it passes from one medium to another is called:

  • A Refraction
  • B Reflection
  • C Diffraction
  • D Polarization
Permalink
Correct Answer: Option A — Refraction
Explanation: Refraction is the bending of light as it travels from one transparent medium into another with a different optical density, caused by the change in the speed of light between the two media.
Submitted by: PaperMCQs
85
Easy fpsc ppsc nts Uploaded: 13 Jul 2026

Which particle carries a positive electric charge in an atom?

  • A Electron
  • B Neutron
  • C Proton
  • D Photon
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Correct Answer: Option C — Proton
Explanation: Protons are positively charged subatomic particles located in the nucleus of an atom with a charge equal in magnitude but opposite in sign to that of an electron.
Submitted by: PaperMCQs
86
Easy css Uploaded: 17 Aug 2026

The de Broglie hypothesis proposed that particles such as electrons exhibit:

  • A No measurable properties
  • B Only wave nature
  • C Both wave and particle nature
  • D Only particle nature
Permalink
Correct Answer: Option C — Both wave and particle nature
Explanation: Louis de Broglie proposed that all matter, including particles like electrons, exhibits wave-like properties in addition to particle properties, introducing the fundamental concept of wave-particle duality in quantum theory.
Submitted by: PaperMCQs
87
Easy fpsc ppsc nts Uploaded: 13 Jul 2026

What is the SI unit of energy?

  • A Joule
  • B Watt
  • C Newton
  • D Pascal
Permalink
Correct Answer: Option A — Joule
Explanation: The Joule is the SI unit of energy defined as the work done when a force of one Newton moves an object one metre in the direction of the force.
Submitted by: PaperMCQs
88
Easy nts Uploaded: 17 Aug 2026

A body moving with uniform velocity has:

  • A Zero acceleration
  • B Zero velocity
  • C Zero displacement
  • D Varying speed
Permalink
Correct Answer: Option A — Zero acceleration
Explanation: When a body moves with uniform velocity, both its speed and direction remain constant, meaning there is no change in velocity over time and hence the acceleration of the body is zero.
Submitted by: PaperMCQs
89
Easy fpsc ppsc nts Uploaded: 05 Aug 2026

Which property of a wave is the distance measured from one crest to the next crest?

  • A Amplitude
  • B Frequency
  • C Wavelength
  • D Speed
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Correct Answer: Option C — Wavelength
Explanation: Wavelength is the distance between two successive identical points on a wave such as crest to crest and is inversely related to frequency for waves travelling at the same speed.
Submitted by: PaperMCQs
90
Easy pms Uploaded: 06 Aug 2026

Which principle explains that pressure applied to an enclosed fluid is transmitted equally in all directions?

  • A Archimedes' Principle
  • B Pascal's Law
  • C Bernoulli's Principle
  • D Boyle's Law
Permalink
Correct Answer: Option B — Pascal's Law
Explanation: Pascal's Law states that pressure applied to an enclosed, incompressible fluid is transmitted undiminished throughout the fluid in all directions. This principle underlies the operation of hydraulic systems including car brakes and lifts.
Submitted by: PaperMCQs
91
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
92
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
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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
93
Easy fpsc Uploaded: 17 Aug 2026

An astronaut in orbit experiences apparent weightlessness because:

  • A There is no air in space
  • B The astronaut and spacecraft are in continuous free fall
  • C The astronaut has no mass
  • D Gravity is zero in space
Permalink
Correct Answer: Option B — The astronaut and spacecraft are in continuous free fall
Explanation: Astronauts in orbit feel weightless because both they and their spacecraft are continuously falling freely under gravity while moving forward, resulting in no normal contact force between the astronaut and the spacecraft.
Submitted by: PaperMCQs
94
Easy css Uploaded: 06 Aug 2026

Which phenomenon explains why the sky appears blue during the day?

  • A Reflection
  • B Refraction
  • C Diffraction
  • D Scattering
Permalink
Correct Answer: Option D — Scattering
Explanation: The sky appears blue due to Rayleigh scattering, where shorter blue wavelengths of sunlight are scattered more strongly by gas molecules in the atmosphere than longer wavelengths like red, spreading blue light across the sky.
Submitted by: PaperMCQs
95
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
96
Easy css Uploaded: 17 Aug 2026

The color with the longest wavelength in the visible spectrum is:

  • A Blue
  • B Red
  • C Green
  • D Violet
Permalink
Correct Answer: Option B — Red
Explanation: Among the colors of the visible light spectrum, red has the longest wavelength, approximately 700 nanometres, while violet has the shortest wavelength, near 400 nanometres, at the opposite end.
Submitted by: PaperMCQs
97
Easy fpsc Uploaded: 06 Aug 2026

Which scientist formulated the three laws of motion?

  • A Albert Einstein
  • B Isaac Newton
  • C Galileo Galilei
  • D Michael Faraday
Permalink
Correct Answer: Option B — Isaac Newton
Explanation: Isaac Newton formulated three fundamental laws of motion describing the relationship between an object's motion and the forces acting upon it. These laws form the foundation of classical mechanics and remain essential to physics today.
Submitted by: PaperMCQs
98
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.
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99
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
100
Easy pms Uploaded: 17 Aug 2026

A concave mirror can produce:

  • A Both real and virtual images depending on object position
  • B Only virtual images
  • C Only real images
  • D No image at all
Permalink
Correct Answer: Option A — Both real and virtual images depending on object position
Explanation: A concave mirror can form either a real, inverted image when the object is beyond the focal point, or a virtual, magnified, erect image when the object is placed within the focal length.
Submitted by: PaperMCQs
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