11000+ Important MCQs for CIVIL SERVICES

11000+ MCQs for CIVIL SERVICES are available here. You can learn these questions for your better preparation. Questions are available with its correct answer. You can check the correct answer of any questions by clicking the option or show answer button.
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Sikhar Chaudhary • 5.88K Points
Tutor III Physics

Q) What type of energy transformation occurs in an electric iron?

  • (A) Mechanical to electrical
  • (B) Electrical to heat
  • (C) Heat to electrical
  • (D) Chemical to heat
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Correct Answer - Option (B)

Explanation :

In an electric iron, electrical energy is converted into heat energy for ironing clothes.

S

Sikhar Chaudhary • 5.88K Points
Tutor III Physics

Q) Which phenomenon explains the twinkling of stars?

  • (A) Reflection
  • (B) Refraction
  • (C) Dispersion
  • (D) Diffraction
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Correct Answer - Option (B)

Explanation :

Twinkling occurs due to atmospheric refraction — light from stars bends as it passes through layers of air.

S

Sikhar Chaudhary • 5.88K Points
Tutor III Physics

Q) Which of the following devices converts sound energy into electrical energy?

  • (A) Speaker
  • (B) Microphone
  • (C) Amplifier
  • (D) Transistor
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Correct Answer - Option (B)

Explanation :

A microphone converts sound (mechanical vibrations) into electrical signals.

S

Sikhar Chaudhary • 5.88K Points
Tutor III Physics

Q) Which color of light has the highest frequency?

  • (A) Red
  • (B) Yellow
  • (C) Violet
  • (D) Green
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Correct Answer - Option (C)

Explanation :

Among visible light, violet has the shortest wavelength and thus the highest frequency.

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