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The incident ray, reflected ray and normal to the reflecting surface at the incident point all never lie in same plane.

  • True
  • False

Answer: Option B

Similar Questions :

1. Electric Motor converts

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

Answer: Option A

2. The nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called

  • Nuclear fusion
  • Nuclear fission
  • Nuclear reaction
  • Fast breeding

Answer: Option B

3. Which of following in not a property of cathode ray.

  • Cathode rays are invisible and travel in a straight line.
  • These rays can ionise gases.
  • These rays can penetrate through thin metal foils.
  • These rays make materials cool on which they fall.

Answer: Option D

Explanation:

These rays heat the materials on which they fall.

4. What are audible sound waves ?

  • Having frequency less than 20 Hz
  • Having frequency between 20 Hz to 20000 Hz
  • Having frequency more than 20000 Hz
  • None of above

Answer: Option B

5. radian per second is unit of

  • Momentum
  • Moment of Inertia
  • Frequency
  • Angle Velocity

Answer: Option D

Explanation:

unit of Momentum is kilogram meter per second,

unit of Moment of Inertia is kilogram square meter,

unit of frequency is Hertz.

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