Physics
Grade-9
Easy

Question

Radian is a unit of:

  1. Time period
  2. Angular displacement
  3. Amplitude
  4. Frequency

hintHint:

One radian is the angle at which that ratio equals one (see the first diagram). 180 degrees = PI radians, 360 degrees = 2*PI radians, 90 degrees = PI/2 radians, etc.

The correct answer is: Frequency


    A radian is a unit of measurement for angles defined by the ratio of the length of the arc of a circle to the radius of that circle.

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