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NTS MCQs

National Testing Service — Complete MCQ Bank

1,084 Questions
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251
Physics Medium

What is the relationship between work done and force in the direction of displacement?

  • AWork equals force times displacement
  • BWork equals force plus displacement
  • CWork equals force times time
  • DWork equals force divided by displacement
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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
252
Physics Medium

Which type of energy is stored in a compressed spring?

  • AKinetic energy
  • BThermal energy
  • CElastic potential energy
  • DChemical energy
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Correct Answer: Option C — Elastic potential energy
Explanation: A compressed spring stores elastic potential energy due to the deformation of its molecular structure and this energy is released as kinetic energy when the spring is allowed to expand.
Submitted by: PaperMCQs
253
Physics Medium

What is meant by the term inertia in physics?

  • AThe tendency of an object to resist changes in its state of motion
  • BThe tendency of an object to accelerate
  • CThe force of gravity on an object
  • DThe energy stored in a moving object
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Correct Answer: Option A — The tendency of an object to resist changes in its state of motion
Explanation: Inertia is the property of matter by which an object resists changes to its state of rest or uniform motion in a straight line as described by Newton's First Law.
Submitted by: PaperMCQs
254
Physics Easy

Which law describes the relationship between the lengths of the sides of a right-angled triangle?

  • ANewton's Law
  • BPythagoras's Theorem
  • CKepler's Law
  • DCoulomb's Law
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Correct Answer: Option B — Pythagoras's Theorem
Explanation: Pythagoras's Theorem states that in a right-angled triangle the square of the hypotenuse equals the sum of the squares of the other two sides and is fundamental in physics calculations.
Submitted by: PaperMCQs
255
Physics Medium

What is the principle behind a periscope?

  • AReflection of light using two parallel mirrors
  • BDiffraction of light
  • CRefraction through lenses
  • DPolarisation of light
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Correct Answer: Option A — Reflection of light using two parallel mirrors
Explanation: A periscope uses two parallel mirrors inclined at 45 degrees to reflect light allowing observation above or around obstacles without direct line of sight.
Submitted by: PaperMCQs
256
Physics Easy

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

  • AVoltmeter
  • BOhmmeter
  • CGalvanometer
  • DAmmeter
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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
257
Physics Easy

Which device is used to measure the potential difference between two points in a circuit?

  • AAmmeter
  • BVoltmeter
  • CGalvanometer
  • DOhmmeter
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Correct Answer: Option B — Voltmeter
Explanation: A voltmeter is connected in parallel across two points in a circuit to measure the potential difference or voltage between them and has a very high internal resistance.
Submitted by: PaperMCQs
258
Physics Medium

What does Einstein's mass-energy equivalence equation state?

  • AE equals mv squared
  • BE equals mc squared
  • CE equals half mc squared
  • DE equals mc
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Correct Answer: Option B — E equals mc squared
Explanation: Einstein's famous equation E equals mc squared states that mass m and energy E are interchangeable with c being the speed of light showing that small masses contain enormous energy.
Submitted by: PaperMCQs
259
Physics Easy

What is the speed of light in a vacuum?

  • A3 x 10 to the power 6 m/s
  • B3 x 10 to the power 10 m/s
  • C3 x 10 to the power 4 m/s
  • D3 x 10 to the power 8 m/s
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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
260
Physics Medium

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

  • ACharles's Law
  • BBoyle's Law
  • CAvogadro's Law
  • DGay-Lussac's Law
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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 in Kelvin.
Submitted by: PaperMCQs
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