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Electric Motor converts

  • Electrical energy into mechanical energy
  • Mechanical energy into Electrical energy
  • Electrical energy into light energy
  • None of above

Answer: Option A

Similar Questions :

1. What is refractive index ?

  • it is defined as the ratio of speed of light in the medium to the speed of light in vacuum.
  • it is defined as the ratio of speed of light in vacuum to the speed of light in the medium .
  • it is defined as the product of speed of light in medium and in vacuum.
  • None of above

Answer: Option B

2. Which instrument is used to measure pressure of gases ?

  • Manometer
  • Machmeter
  • Magnetometer
  • Micrometer

Answer: Option A

Explanation:

Machmeter - is used to determine the speed of an aircraft in terms of speed of sound,

Magnetometer - is used to compare magnetic movements and fields,

Micrometer - is used to convert sound waves into electrical vibrations.

3. What is the relation between wavelength, frequency and velocity ?

  • velocity of wave = frequency * wavelength
  • velocity of wave = frequency/wavelength
  • velocity of wave = wavelength/frequency
  • None of above

Answer: Option A

4. The angle of reflection is equal to the angle of incidence.

  • True
  • False

Answer: Option A

5. The rotational effect of a force on a body about an axis of rotation is described in terms of

  • Centre of gravity
  • Centripetal force
  • Centrifugal force
  • Moment of force

Answer: Option D

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