[" An electric heater rated as "(500W" and "200V)" raises "],[" the temperature of "1kg" water from "15^(@)C" to its boiling "],[" point in "15min" .The heat efficiency of the heater is "]

An electric heater rated as (500 W and 200 V) raises the temperature of 1 kg water from 15^(@)C to its boiling point in 15 min. the heat effeciency of the heater is

Heat needed to raise the temperature of 1 kg of water from 14.5^(@)C to 15.5^(@) C is ________ .

An electric kettle was marked 500 W,220 V and was found to raise 1 kg of water to 20^(@) to the boiling point in 20 minutes. Calculate the heat efficiency of the kettle. Sp. Heat of water = 4200 J kg^(-1) K^(-1) .

How long does a 59 kw water heater take to raise the temperature of 150L of water from 21^(@)C to 38^(@)C (in min)

How long does a 59 kw water heater take to raise the temperature of 150L of water from 21^(@)C to 38^(@)C (in min)

An electric heater is rated 1000 W - 200 V. Calculate the resistance of the heating element.

A electric kettle ( rated accurately at 2.5 kW ) is used to heat 3 kg of water from 15^(@)C to boiling point . It takes 9.5 min . Then the amount of heat that has been lost is

A electric kettle ( rated accurately at 2.5 kW ) is used to heat 3 kg of water from 15^(@)C to boiling point . It takes 9.5 min . Then the amount of heat that has been lost is

An electric heater is rated 1000 W - 200 V. Calculate the current flowing though it.