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NTS MCQs

National Testing Service — Complete MCQ Bank

1,084 Questions
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NTS tests evaluate aptitude, analytical reasoning, quantitative ability, English and subject knowledge for admissions, scholarships and recruitment.

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261
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
Permalink
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
262
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
263
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
Permalink
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
264
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
Permalink
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
265
Physics Medium

Which phenomenon explains why the sky appears blue?

  • AScattering of blue light by atmospheric molecules
  • BReflection of ocean colour
  • CAbsorption of blue light by clouds
  • DRefraction through ice crystals
Permalink
Correct Answer: Option A — Scattering of blue light by atmospheric molecules
Explanation: The sky appears blue due to Rayleigh scattering where shorter blue wavelengths of sunlight are scattered more strongly by atmospheric gas molecules than longer wavelength red light.
Submitted by: PaperMCQs
266
Physics Medium

Which device stores electrical energy in an electric field between two conductors?

  • AInductor
  • BResistor
  • CTransformer
  • DCapacitor
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Correct Answer: Option D — Capacitor
Explanation: A capacitor stores electrical energy in an electric field between two parallel conducting plates separated by an insulating material called a dielectric.
Submitted by: PaperMCQs
267
Physics Medium

What is the SI unit of electric charge?

  • ACoulomb
  • BAmpere
  • CVolt
  • DFarad
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Correct Answer: Option A — Coulomb
Explanation: The Coulomb is the SI unit of electric charge defined as the quantity of electricity transported in one second by a current of one ampere.
Submitted by: PaperMCQs
268
Physics Easy

Which particle in an atom has no electric charge?

  • AProton
  • BElectron
  • CNeutron
  • DPhoton
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Correct Answer: Option C — Neutron
Explanation: Neutrons are electrically neutral subatomic particles found in the nucleus of an atom alongside protons and their presence affects the mass and stability of the nucleus.
Submitted by: PaperMCQs
269
Physics Easy

Which particle carries a positive electric charge in an atom?

  • AElectron
  • BNeutron
  • CProton
  • DPhoton
Permalink
Correct Answer: Option C — Proton
Explanation: Protons are positively charged subatomic particles located in the nucleus of an atom with a charge equal in magnitude but opposite in sign to that of an electron.
Submitted by: PaperMCQs
270
Physics Easy

Which particle carries a negative electric charge in an atom?

  • AProton
  • BElectron
  • CNeutron
  • DNucleus
Permalink
Correct Answer: Option B — Electron
Explanation: Electrons are subatomic particles carrying a negative electric charge of 1.6 x 10 to the power of minus 19 coulombs and orbit the nucleus of an atom.
Submitted by: PaperMCQs
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