An electric room heater has a resistance of `25 Omega` and operates at `220 V` for `12` minutes. Calculate heat energy dissapated by it in kilojoules.

An electric heater a current of 5 A and its element has a resistance of 50 Omega . If the heater is switched on for 5 minutes, calculate the energy released in kilojoules.

A resistance of 25 Omega is connected to a 12V battery. Calculate the heat energy in joules generated per minute.

An electrical appliance having a resistance of 200 Omega is operated at 200 V. Calculate the energy consumed by the appliance in 5 minutes in kWh.

An electric heater has coil resistance of 12 Omega and is operated from 220 V power line. If no heat escapes from it then how much time is required to raise the temperature of 40 kg of water from 10^(@)C to 80^(@)C ?

An electric heater draws a current of 5 A when connected to 220 V mains. Calculate the resistance of its filament.

A bulb rated 12 V, 24 W operates on a 12 volt battery for 20 minutes. Calculate : the energy consumed.

The rating of an electric heater is1100 w, 220V calculate the resistance when it operates at 220 v, also calculate the energy consumed in kwh in the month of November, if the heater is used daily for 4 hours at the rated voltage.

An electric heater of resistance 8 Omega draws 15 A from the service mains 2 hours. Calculate the rate at which heat is developed in the heater.