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NTS MCQs

National Testing Service — Complete MCQ Bank

49 Questions
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11
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
12
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
13
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
14
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
15
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
16
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
17
Physics Medium

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

  • ABoyle's Law
  • BCharles's Law
  • CAvogadro's Law
  • DGay-Lussac's Law
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Correct Answer: Option A — Boyle's Law
Explanation: Boyle's Law states that at constant temperature the pressure of a fixed amount of gas is inversely proportional to its volume meaning doubling pressure halves the volume.
Submitted by: PaperMCQs
18
Physics Medium

Which type of spectrum is produced when white light passes through a prism?

  • ALine emission spectrum
  • BContinuous spectrum
  • CBand spectrum
  • DAbsorption spectrum
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Correct Answer: Option B — Continuous spectrum
Explanation: A prism produces a continuous spectrum showing a smooth gradation from red to violet as white light is dispersed into its component wavelengths through refraction.
Submitted by: PaperMCQs
19
Physics Medium

Which law explains why rockets can propel themselves in space?

  • ANewton's First Law
  • BNewton's Third Law
  • CBernoulli's Principle
  • DNewton's Second Law
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Correct Answer: Option B — Newton's Third Law
Explanation: Rockets work on Newton's Third Law as gases expelled backward at high speed produce an equal and opposite forward thrust allowing propulsion even in the vacuum of space.
Submitted by: PaperMCQs
20
Physics Medium

What does a transformer do to alternating current?

  • AChanges the voltage of AC
  • BConverts AC to DC
  • CConverts DC to AC
  • DChanges the frequency of AC
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Correct Answer: Option A — Changes the voltage of AC
Explanation: A transformer changes the voltage of alternating current using electromagnetic induction between primary and secondary coils stepping voltage up or down depending on the turns ratio.
Submitted by: PaperMCQs
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