Q. Which instrument is used to measure the power of electric circuit ?
a. Wavemeter
b. Viscometer
c. Wattmeter
d. None of these
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.
