Physics
Grade-9
Easy
Question
Radian is a unit of:
- Time period
- Angular displacement
- Amplitude
- Frequency
Hint:
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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