Which instrument is used to measure the power of electric circuit?
AWattmeter
BNone of these
CViscometer
DWavemeter
Correct answer
A. Wattmeter
Explanation
A wattmeter is an electrical instrument which is used to measure the electric power (in watts) of any electrical circuit. Voltmeter – is used to measure electric potential difference between two points, Wavemeter – is used to measure the wavelength of a radiowave, Viscometer – is used measure viscosity of liquid.