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Physics MCQs

118 Questions Subject Test
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41
Medium nts Uploaded: 06 Aug 2026

What is the term for the point at which an object experiences zero net force and constant velocity?

  • A Terminal velocity
  • B Free fall
  • C Resonance
  • D Equilibrium
Permalink
Correct Answer: Option D — Equilibrium
Explanation: Equilibrium occurs when an object experiences zero net force acting upon it, resulting in either a state of rest or constant, unchanging velocity, as described by Newton's First Law regarding balanced forces.
Submitted by: PaperMCQs
42
Easy fpsc ppsc nts Uploaded: 13 Jul 2026

Which law states that every action has an equal and opposite reaction?

  • A Newton's First Law
  • B Newton's Second Law
  • C Newton's Third Law
  • D Law of Gravitation
Permalink
Correct Answer: Option C — Newton's Third Law
Explanation: Newton's Third Law states that for every action there is an equal and opposite reaction meaning forces always occur in pairs acting on different objects.
Submitted by: PaperMCQs
43
Easy nts Uploaded: 17 Aug 2026

The friction that opposes the start of motion between two surfaces is called:

  • A Rolling friction
  • B Static friction
  • C Fluid friction
  • D Kinetic friction
Permalink
Correct Answer: Option B — Static friction
Explanation: Static friction is the resistive force that must be overcome to initiate relative motion between two surfaces in contact; it generally has a higher maximum value than kinetic friction for the same surfaces.
Submitted by: PaperMCQs
44
Medium fpsc ppsc nts Uploaded: 13 Jul 2026

What is the terminal velocity of a falling object?

  • A Minimum speed during fall
  • B Speed at which object first starts moving
  • C Speed independent of mass
  • D Maximum speed reached when weight equals air resistance
Permalink
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
45
Hard nts Uploaded: 06 Aug 2026

What is the term for the distance traveled by an object per unit time?

  • A Acceleration
  • B Speed
  • C Velocity
  • D Displacement
Permalink
Correct Answer: Option B — Speed
Explanation: Speed is defined as the distance traveled by an object divided by the time taken, representing how fast an object moves regardless of direction. It is a scalar quantity, unlike velocity which includes direction.
Submitted by: PaperMCQs
46
Easy nts Uploaded: 17 Aug 2026

The commercial unit of electrical energy is the:

  • A Kilowatt-hour
  • B Ampere-hour
  • C Watt
  • D Joule
Permalink
Correct Answer: Option A — Kilowatt-hour
Explanation: The kilowatt-hour (kWh) is the standard commercial unit used to measure electrical energy consumption, representing the energy used by a one-kilowatt device operating continuously for one hour, as billed by utilities.
Submitted by: PaperMCQs
47
Easy nts Uploaded: 17 Aug 2026

Which principle explains why a hydraulic lift can multiply force?

  • A Pascal's law
  • B Bernoulli's principle
  • C Newton's third law
  • D Archimedes' principle
Permalink
Correct Answer: Option A — Pascal's law
Explanation: Pascal's law states that pressure applied to an enclosed fluid is transmitted undiminished in all directions, allowing a small force on a small piston to produce a much larger force on a larger piston.
Submitted by: PaperMCQs
48
Easy nts Uploaded: 06 Aug 2026

What is the SI unit of electric resistance?

  • A Volt
  • B Ampere
  • C Farad
  • D Ohm
Permalink
Correct Answer: Option D — Ohm
Explanation: The Ohm (Ω) is the SI unit of electrical resistance, named after Georg Ohm. It measures the opposition a material offers to the flow of electric current, defined through Ohm's Law as voltage divided by current.
Submitted by: PaperMCQs
49
Medium nts Uploaded: 06 Aug 2026

What is the term for the amount of matter contained in an object?

  • A Weight
  • B Volume
  • C Density
  • D Mass
Permalink
Correct Answer: Option D — Mass
Explanation: Mass is the quantity of matter contained within an object, remaining constant regardless of location. Unlike weight, which varies with gravitational pull, mass is measured in kilograms and represents a fundamental property of matter.
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50
Easy nts Uploaded: 17 Aug 2026

A convex lens is also known as a:

  • A Converging lens
  • B Cylindrical lens
  • C Plane lens
  • D Diverging lens
Permalink
Correct Answer: Option A — Converging lens
Explanation: A convex lens, which is thicker at the center than at the edges, is called a converging lens because it bends parallel rays of light inward to meet at a single focal point.
Submitted by: PaperMCQs
51
Medium nts Uploaded: 17 Aug 2026

The neutron was discovered by:

  • A Ernest Rutherford
  • B J.J. Thomson
  • C Marie Curie
  • D James Chadwick
Permalink
Correct Answer: Option D — James Chadwick
Explanation: James Chadwick discovered the neutron in 1932, identifying it as an electrically neutral subatomic particle residing in the nucleus alongside protons, for which he was later awarded the Nobel Prize.
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52
Easy fpsc ppsc nts Uploaded: 13 Jul 2026

What is the unit of electrical resistance?

  • A Volt
  • B Ampere
  • C Watt
  • D Ohm
Permalink
Correct Answer: Option D — Ohm
Explanation: The Ohm named after German physicist Georg Simon Ohm is the SI unit of electrical resistance defined as the resistance that produces a potential difference of one volt per ampere.
Submitted by: PaperMCQs
53
Easy nts Uploaded: 06 Aug 2026

Which type of current periodically reverses direction?

  • A Alternating current
  • B Direct current
  • C Static current
  • D Induced current
Permalink
Correct Answer: Option A — Alternating current
Explanation: Alternating current, or AC, periodically reverses direction as it flows through a circuit, unlike direct current which flows in one constant direction. Most household electrical power is supplied as alternating current for efficient long-distance transmission.
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54
Medium fpsc ppsc nts Uploaded: 13 Jul 2026

What is the formula for kinetic energy?

  • A mv
  • B mgh
  • C half mv squared
  • D Fxd
Permalink
Correct Answer: Option C — half mv squared
Explanation: Kinetic energy is calculated using the formula KE equals half multiplied by mass multiplied by velocity squared showing that kinetic energy increases with the square of speed.
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55
Medium nts Uploaded: 17 Aug 2026

The value of the universal gravitational constant G is approximately:

  • A 3 x 10^8 m/s
  • B 1.6 x 10^-19 C
  • C 6.67 x 10^-11 N m^2/kg^2
  • D 9.8 m/s^2
Permalink
Correct Answer: Option C — 6.67 x 10^-11 N m^2/kg^2
Explanation: The universal gravitational constant G has an approximate value of 6.67 x 10^-11 N m^2/kg^2, and it appears in Newton's law of gravitation to relate force, mass, and distance between two bodies.
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56
Medium nts Uploaded: 06 Aug 2026

Which scientist discovered the electron?

  • A Ernest Rutherford
  • B Niels Bohr
  • C James Chadwick
  • D J.J. Thomson
Permalink
Correct Answer: Option D — J.J. Thomson
Explanation: J.J. Thomson discovered the electron in 1897 through his cathode ray tube experiments. He demonstrated that cathode rays consisted of negatively charged particles much smaller than atoms, leading to the plum pudding model of atomic structure.
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57
Medium nts Uploaded: 06 Aug 2026

Which type of energy is transferred through electromagnetic waves without requiring a medium?

  • A Mechanical energy
  • B Chemical energy
  • C Nuclear energy
  • D Radiant energy
Permalink
Correct Answer: Option D — Radiant energy
Explanation: Radiant energy, carried by electromagnetic waves such as light, radio waves, and X-rays, can travel through the vacuum of space without requiring a physical medium, unlike mechanical waves which need matter to propagate.
Submitted by: PaperMCQs
58
Easy nts Uploaded: 17 Aug 2026

Which lens is used to correct hyperopia (farsightedness)?

  • A Convex lens
  • B Concave lens
  • C Cylindrical lens
  • D Plane lens
Permalink
Correct Answer: Option A — Convex lens
Explanation: Hyperopia, or farsightedness, occurs when the eye focuses images behind the retina, and it is corrected using a convex (converging) lens that helps focus light rays properly onto the retina.
Submitted by: PaperMCQs
59
Medium nts Uploaded: 06 Aug 2026

What is the SI unit of temperature?

  • A Kelvin
  • B Celsius
  • C Fahrenheit
  • D Joule
Permalink
Correct Answer: Option A — Kelvin
Explanation: The Kelvin scale is the SI unit for temperature, based on absolute zero as its starting point, where all molecular motion theoretically ceases. It is widely used in scientific research due to its absolute reference point.
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60
Hard nts Uploaded: 17 Aug 2026

Which thermometric scale has no negative values?

  • A Fahrenheit
  • B Kelvin
  • C Celsius
  • D Both Celsius and Fahrenheit
Permalink
Correct Answer: Option B — Kelvin
Explanation: The Kelvin scale is an absolute temperature scale that starts at absolute zero and has no negative values, unlike the Celsius and Fahrenheit scales which can represent temperatures below their zero points.
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