Electric room radiator which operates at 225 volts has resistance of 50 ohms . Power of the radiator is approximately

A toaster operating at 240 V has a resistance of 120 Omega . The power is

A toaster operating at 240 V has a resistance of 120Omega . The power is ………. .

A toaster operating at 240 V has a resistance of 120Omega . The power is ………. .

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.

Electric field inside a copper wire of length 10 m , resistance 2 ohm connected to a 10 volt battery is

A radioactive source emits three type of radiations. (a) Name the three radiations. (b) Name the radiations which are deflected by the electric field. ( c) Name the radiation which is most penetrating. (d) Name the radiation which travels with the speed of light. (e) Name the radiation which has the highest ionising power. (f) Name the radiation consisting of the same kind of particles as the cathode rays.

The surface of a household radiator has an emissivity of 0.55 and an area of 1.5 m^(2) . (a) At what rate is radiation emitted by the radiator when its temperature is 50^(@)C ? (b) At what rate is the radiation absorbed by the radiator when the walls of the room are at 22^(@)C ? (c ) What is the net rate of radiation from the radiator? (stefan constant sigma = 6 xx 10^(-8)W//m^(2)-K^(4))