Electronic Devices and Communication MCQ with Answers

wattmeter is used to measure power

Rate of change of displacement is called Velocity.
Velocity The rate of change of position of a particle in a given direction is called its velocity. Thus velocity is displacement made by the body per unit time. Velocity is a vector quantity.

Speed The rate of change of position of particle irrespective of direction is called speed. It is measured by distance covered per unit time. Speed is a scalar quantity.

colorimeter is used to determine the intensity of colors

The Electric circuit which changes its direction at regular intervals of time is called alternating current.

when body is moving with constant velocity it's acceleration is 0