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Physics MCQs

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

MechanicsWavesElectricityModern Physics
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121
Medium fpsc Uploaded: 06 Aug 2026

What is the term for the study of motion without considering the forces causing it?

  • A Kinematics
  • B Dynamics
  • C Statics
  • D Mechanics
Permalink
Correct Answer: Option A — Kinematics
Explanation: Kinematics is the branch of mechanics that describes motion in terms of displacement, velocity, and acceleration without analyzing the forces responsible for that motion. It focuses purely on describing how objects move over time.
Submitted by: PaperMCQs
122
Medium nts Uploaded: 17 Aug 2026

Which of the following best defines heat?

  • A Energy stored in a body
  • B Total kinetic energy of molecules
  • C Force between molecules
  • D Energy transferred due to temperature difference
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Correct Answer: Option D — Energy transferred due to temperature difference
Explanation: Heat is defined as the transfer of thermal energy between two systems or objects due to a temperature difference between them, always flowing spontaneously from hotter to colder regions.
Submitted by: PaperMCQs
123
Medium fpsc ppsc nts Uploaded: 13 Jul 2026

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

  • A Sound wave
  • B Water wave
  • C Seismic wave
  • D Electromagnetic wave
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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
124
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The formula for kinetic energy is:

  • A mgh
  • B Fd
  • C mv
  • D (1/2)mv^2
Permalink
Correct Answer: Option D — (1/2)mv^2
Explanation: Kinetic energy, the energy possessed by a body due to its motion, is calculated using the formula one-half times mass times velocity squared, derived from the work-energy theorem in classical mechanics.
Submitted by: PaperMCQs
125
Medium fpsc ppsc nts Uploaded: 05 Aug 2026

Which device converts light energy directly into electrical energy using the photovoltaic effect?

  • A Generator
  • B Transformer
  • C Solar cell
  • D Battery
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Correct Answer: Option C — Solar cell
Explanation: A solar cell converts light energy directly into electrical energy using the photovoltaic effect when photons knock electrons free in semiconductor materials creating an electric current.
Submitted by: PaperMCQs
126
Medium css fpsc ppsc Uploaded: 13 Jul 2026

What is the centripetal force?

  • A Force pushing an object outward in circular motion
  • B Force causing linear acceleration
  • C Force equal to mass times velocity
  • D Force directed toward the centre of circular motion
Permalink
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
127
Medium nts Uploaded: 06 Aug 2026

What is the term for the smallest particle of an element that retains its chemical properties?

  • A Molecule
  • B Ion
  • C Atom
  • D Electron
Permalink
Correct Answer: Option C — Atom
Explanation: An atom is the smallest unit of an element that retains all the chemical properties of that element. Atoms consist of a nucleus containing protons and neutrons, surrounded by orbiting electrons in defined energy levels.
Submitted by: PaperMCQs
128
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The phenomenon of bending of light around obstacles is called:

  • A Refraction
  • B Diffraction
  • C Reflection
  • D Dispersion
Permalink
Correct Answer: Option B — Diffraction
Explanation: Diffraction is the bending and spreading of waves, including light and sound, as they pass around obstacles or through narrow openings, becoming more noticeable when the obstacle size is comparable to the wavelength.
Submitted by: PaperMCQs
129
Medium nts Uploaded: 17 Aug 2026

Which particle has no electric charge and is found in the nucleus?

  • A Proton
  • B Electron
  • C Neutron
  • D Positron
Permalink
Correct Answer: Option C — Neutron
Explanation: The neutron is a subatomic particle with no net electric charge, residing in the nucleus of an atom alongside positively charged protons, and it contributes to the overall mass of the atom.
Submitted by: PaperMCQs
130
Medium ppsc Uploaded: 17 Aug 2026

A collision in which kinetic energy is not conserved is called:

  • A Inelastic collision
  • B Elastic collision
  • C Momentum collision
  • D Perfectly elastic collision
Permalink
Correct Answer: Option A — Inelastic collision
Explanation: In an inelastic collision, total momentum of the system is conserved but kinetic energy is not, as some energy is transformed into heat, sound, or deformation of the colliding bodies during impact.
Submitted by: PaperMCQs
131
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What is the term for the point where all the weight of an object appears to act?

  • A Centroid
  • B Center of mass
  • C Center of gravity
  • D Focal point
Permalink
Correct Answer: Option C — Center of gravity
Explanation: The center of gravity is the point in an object where its entire weight is considered to act for analytical purposes. For uniform gravitational fields, this coincides with the center of mass, simplifying calculations of balance and stability.
Submitted by: PaperMCQs
132
Medium css fpsc ppsc Uploaded: 13 Jul 2026

What is the half-life of a radioactive substance?

  • A Time for the substance to completely decay
  • B Time for the radiation to halve in intensity only
  • C Time for half the nuclei to decay
  • D Time for temperature to reduce by half
Permalink
Correct Answer: Option C — Time for half the nuclei to decay
Explanation: Half-life is the time required for half of the radioactive nuclei in a sample to decay and it is a constant characteristic value specific to each radioactive isotope.
Submitted by: PaperMCQs
133
Medium ppsc Uploaded: 17 Aug 2026

The boiling point of water on the Fahrenheit scale is:

  • A 100 degrees
  • B 212 degrees
  • C 32 degrees
  • D 373 degrees
Permalink
Correct Answer: Option B — 212 degrees
Explanation: On the Fahrenheit scale, water boils at 212 degrees Fahrenheit under standard atmospheric pressure, corresponding to 100 degrees Celsius, forming an important reference point on this temperature scale.
Submitted by: PaperMCQs
134
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Which of the following is a semiconductor material?

  • A Silicon
  • B Rubber
  • C Copper
  • D Aluminum
Permalink
Correct Answer: Option A — Silicon
Explanation: Silicon is a widely used semiconductor material whose electrical conductivity lies between that of a conductor and an insulator, and it forms the foundational material for most modern electronic devices.
Submitted by: PaperMCQs
135
Medium nts Uploaded: 17 Aug 2026

If the net force on a body is zero, the body is said to be in:

  • A Accelerated motion
  • B Circular motion
  • C Equilibrium
  • D Free fall
Permalink
Correct Answer: Option C — Equilibrium
Explanation: A body is in equilibrium when the net force acting upon it is zero, meaning it either remains at rest or continues moving with constant velocity, in accordance with Newton's first law of motion.
Submitted by: PaperMCQs
136
Medium ppsc Uploaded: 06 Aug 2026

What is the value of absolute zero temperature in Celsius?

  • A -373°C
  • B -273.15°C
  • C -100°C
  • D 0°C
Permalink
Correct Answer: Option B — -273.15°C
Explanation: Absolute zero is -273.15°C, the theoretical temperature at which all molecular motion ceases and entropy reaches its minimum value. It serves as the zero point on the Kelvin scale, which is widely used in thermodynamic calculations.
Submitted by: PaperMCQs
137
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What is the term for the point at which a projectile reaches its highest vertical position?

  • A Maximum height
  • B Range
  • C Trajectory
  • D Apex velocity
Permalink
Correct Answer: Option A — Maximum height
Explanation: The maximum height of a projectile refers to the highest vertical point it reaches during flight, occurring when its vertical velocity component momentarily becomes zero before gravity pulls it back downward toward the ground.
Submitted by: PaperMCQs
138
Medium ppsc Uploaded: 06 Aug 2026

Which quantity remains constant in an isolated system according to the law of conservation of momentum?

  • A Total momentum
  • B Total energy
  • C Total mass
  • D Total force
Permalink
Correct Answer: Option A — Total momentum
Explanation: The law of conservation of momentum states that the total momentum of an isolated system remains constant unless acted upon by external forces. This principle applies to collisions, explosions, and various interactions between objects.
Submitted by: PaperMCQs
139
Medium fpsc Uploaded: 17 Aug 2026

According to Bernoulli's principle, as the speed of a fluid increases, its pressure:

  • A Decreases
  • B Increases
  • C Becomes zero
  • D Remains constant
Permalink
Correct Answer: Option A — Decreases
Explanation: Bernoulli's principle states that for an ideal flowing fluid, an increase in the speed of the fluid occurs simultaneously with a decrease in pressure or potential energy, explaining phenomena like airplane lift.
Submitted by: PaperMCQs
140
Medium css fpsc ppsc Uploaded: 13 Jul 2026

Which experiment demonstrated that light behaves as a wave by producing an interference pattern?

  • A Young's double slit experiment
  • B Rutherford's gold foil experiment
  • C Millikan's oil drop experiment
  • D Compton scattering experiment
Permalink
Correct Answer: Option A — Young's double slit experiment
Explanation: Young's double slit experiment demonstrated light's wave nature by producing alternating bright and dark fringes on a screen when coherent light passed through two closely spaced slits.
Submitted by: PaperMCQs
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