Electric Power | MCQs

Explanation

Electric power: Rate of energy transfer.

It is measured in watts (W), or one joule per second.

Energy/Work: Measured in joules (J).

Charge: Measured in coulombs (C).

Pressure: Measured in pascals (Pa).

Electric current: Measured in amperes (A).

Electric resistance: Measured in ohms (Ω).

Temperature: Measured in kelvin (K).

Torque: Measured in newton metres (N m).

Velocity: Measured in meters per second (m/s).

Acceleration: Measured in meters per second squared (m/s²).

Explanation

Explanation

A wattmeter is an electrical instrument which is used to measure the electric power (in watts) of any electrical circuit.

**Additional Information**

Voltmeter – is used to measure the electric potential difference between two points,

Wavemeter – is used to measure the wavelength of a radio wave,

Viscometer – is used to measure the viscosity of the liquid.

Explanation

Power is calculated using P = V × I.

Here, I = 51.2 mA = 0.0512 A, so P = 220 V × 0.0512 A = 11.26 W.