NEET MCQs with answers Page - 22

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Q. The time period of a satellite orbiting close to the Earth's surface is approximately:

  • (A) 24 hours
  • (B) 90 minutes
  • (C) 12 hours
  • (D) 48 hours

A

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Q. The unit of coefficient of viscosity is:

  • (A) N/m
  • (B) Pa·s
  • (C) J/s
  • (D) N·m

A

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Q. The dimensions of gravitational potential are:

  • (A) [ML²T⁻²]
  • (B) [L²T⁻²]
  • (C) [MLT⁻²]
  • (D) [LT⁻¹]

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Q. Which phenomenon explains the blue color of the sky?

  • (A) Reflection
  • (B) Refraction
  • (C) Scattering
  • (D) Diffraction

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Q. The resistance of an ideal voltmeter is:

  • (A) Zero
  • (B) One ohm
  • (C) Infinite
  • (D) 100 ohm

A

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Q. The resistance of an ideal ammeter is:

  • (A) Infinite
  • (B) Zero
  • (C) 10 ohm
  • (D) 100 ohm

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Q. The efficiency of a Carnot engine depends upon:

  • (A) Working substance
  • (B) Pressure
  • (C) Temperatures of source and sink
  • (D) Volume of gas

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Q. The number of photons emitted per second by a light source increases when:

  • (A) Frequency increases at constant power
  • (B) Power increases at constant frequency
  • (C) Wavelength decreases at constant power
  • (D) Temperature decreases

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Q. Which of the following has the dimension of pressure?

  • (A) Energy density
  • (B) Impulse
  • (C) Momentum
  • (D) Angular momentum

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Q. The relation between wavelength λ and frequency ν of a wave is:

  • (A) ν = λ/v
  • (B) v = λν
  • (C) λ = vν
  • (D) ν = vλ

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