The amplitude of sound waves is measured in the units of

Electricity consumption bill is based on the measurement of –

Which of the following metals is used as filament in lighting bulbs?

The heating element in an electric iron is usually made of

A 100 W electric bulb is used for 10 hours a day. How many units of electrical energy are consumed by the bulb in 3 days ? (1 unit = 1 kWh)

If the speed of a moving magnet inside a coil increases, the electric current in the coil