A 800W electrical device is designed to work in 200V. What will be its power if the device is working in 100 V ?

A 400W electrical device is designed to work in 100V. What will be its power if the device is working in 100V.

How much will be the power of a 220 V, 100 W electric bulb working at 110 V ?

An electric bulb is labelled 40W, 200V. What is the resistance of the filament?

0.5 A current flows through an electric heating device connected to 230 V supply . How much is the power of heating device connecting to the circuit if we ignore the resistance of the circuit wire ?

If we apply 230 V for a device having 230V and 400 W ,what will happen the power of device ? ( increases , decreases, does not change)

A heat engine is a device which converts heat energy into work. What is the working substance in an ideal heat engine.

Power of an electric heater working in 230 V is 1000W. Calculate the heat produced if the current passes for 5 minutes through the circuit .

A bulb of power 40W is designed to öperate at 240V. Calculate resistance of the filament in the bulb.