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Physics MCQs

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261
Easy pms Uploaded: 17 Aug 2026

A body moving in a circle at constant speed has:

  • A Centripetal acceleration directed toward the center
  • B Constant velocity
  • C Zero acceleration
  • D Acceleration directed away from the center
Permalink
Correct Answer: Option A — Centripetal acceleration directed toward the center
Explanation: Uniform circular motion involves continuously changing direction of velocity, producing centripetal acceleration directed toward the center of the circle, even though the speed remains constant throughout the motion.
Submitted by: PaperMCQs
262
Easy fpsc ppsc nts Uploaded: 13 Jul 2026

What is the speed of light in a vacuum?

  • A 3 x 10 to the power 6 m/s
  • B 3 x 10 to the power 10 m/s
  • C 3 x 10 to the power 4 m/s
  • D 3 x 10 to the power 8 m/s
Permalink
Correct Answer: Option D — 3 x 10 to the power 8 m/s
Explanation: The speed of light in a vacuum is approximately 3 x 10 to the power of 8 metres per second or 300000 kilometres per second and is denoted by the letter c.
Submitted by: PaperMCQs
263
Easy css Uploaded: 06 Aug 2026

Which particle has no electric charge?

  • A Neutron
  • B Proton
  • C Electron
  • D Positron
Permalink
Correct Answer: Option A — Neutron
Explanation: The neutron is a subatomic particle found in the nucleus of an atom that carries no net electric charge. Along with protons, neutrons contribute to the atomic mass, but unlike protons, they do not affect the atom's overall charge.
Submitted by: PaperMCQs
264
Easy ppsc Uploaded: 06 Aug 2026

What is the term for an object's tendency to maintain constant velocity unless acted upon?

  • A Momentum
  • B Torque
  • C Impulse
  • D Inertia
Permalink
Correct Answer: Option D — Inertia
Explanation: Inertia describes an object's natural tendency to resist changes in its state of motion, whether at rest or moving at constant velocity. Objects with greater mass exhibit greater inertia and require more force to accelerate.
Submitted by: PaperMCQs
265
Medium ppsc Uploaded: 17 Aug 2026

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
266
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
267
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
268
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
269
Medium pms Uploaded: 06 Aug 2026

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
270
Hard ppsc Uploaded: 06 Aug 2026

Which law states that the volume of a gas is directly proportional to its temperature at constant pressure?

  • A Charles's Law
  • B Boyle's Law
  • C Gay-Lussac's Law
  • D Avogadro's Law
Permalink
Correct Answer: Option A — Charles's Law
Explanation: Charles's Law states that at constant pressure, the volume of a fixed amount of gas is directly proportional to its absolute temperature. As temperature increases, gas molecules move faster, causing the gas to expand proportionally.
Submitted by: PaperMCQs
271
Hard pms Uploaded: 17 Aug 2026

The SI unit of electric current is:

  • A Volt
  • B Ohm
  • C Ampere
  • D Coulomb
Permalink
Correct Answer: Option C — Ampere
Explanation: Electric current, the rate of flow of electric charge, is measured in Amperes (A) in the SI system, named after the French physicist Andre-Marie Ampere, a pioneer of electromagnetism.
Submitted by: PaperMCQs
272
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
273
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
Permalink
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
274
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
275
Medium pms Uploaded: 17 Aug 2026

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
276
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
277
Easy fpsc ppsc nts Uploaded: 13 Jul 2026

What is the SI unit of pressure?

  • A Newton
  • B Joule
  • C Pascal
  • D Watt
Permalink
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
278
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
279
Medium pms Uploaded: 06 Aug 2026

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
280
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
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