An immersion heater rated `1000 W, 220 V` is used to heat `0.01 m^3` of water. Assuming that the power is supplied at `220 V and 60%` of the power supplied is used to heat the water, how long will it take to increase the temperature of the water from `15^@ C` to `40^@ C` ?

An immersion heater is rated 836 watt . It should heat 1 litre of water from 10^(@)C to 40^(@)C in about

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 ?

A coil of resistance 100 Omega is connected across a battery of emf 6.0 V . Assume that the heat developed in the coul is used to raise its temperature. If the heat capacity of the coil is 4.0 J K^(-1) , how long will it take to raise the temperature of the coil by 15^@ C ?

A coil of resistance 100 Omega is connected across a battery of emf 6.0 V . Assume that the heat developed in the coil is used to raise its temperature. If the heat capacity of the coil is 4.0 J K^(-1) , how long will it take to raise the temperature of the coil by 15^@ C ?

A coil of resistance 100 Omega is connected across a battery of emf 6.0 V . Assume that the heat developed in the coil is used to raise its temperature. If the heat capacity of the coil is 4.0 J K^(-1) , how long will it take to raise the temperature of the coil by 15^@ C ?

How much heat to be supplied to raise the temperature of 100 g water from 20^(@)C to the normal boilling point of water ?

A 210 W heater is used to heat 100 g water. The time required to raise the temperature of this water from 25^(@)C to 100^(@)C is (specific heat capacity of water =4200" J/Kg-"^(@)C )

Calculate the time required to heat 20 kg of water from 10^(@)C to 35^(@)C using an immersion heater rated 1000 W. Assume that 80% of the power input is used to heat the water. Specific heat capacity of water =4200 J//kg-k