An electric kettle taking ` 3 A "at" 210 V` brings `1 L ` of water from ` 20^(@) C to 80^(@) C "in" 10 min`. Find its efficiency.

An electric kettle taking 3.5A at 210V brings 1200cc of water from 25^(@) "to" 95^(@)C in 12minutes. Find the percentage of the supplied energy which goes towards heating water.

It takes 10 min for an electric kettle to heat a certain quantity of water from 0^@C to 100^@C . It takes 54 min to convert this water 100^@C into steam Then latent heat of steam is

It takes 10 in for an electric kettle to theat a certain quantity of water from 0^@C to 100^@C . It takes 54 min to convert this water 100^@C into steam Then latent heat of steam is

An electric kettle takes 20 min. to heat a certain quantity of water from 0^@C to boiling point. It requires 90 minutes to turn all the water at 100^@C into steam. Find the latest heat of vaporisation. (specific heat of water= 1 cal//gm//^@C )

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 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) .