A copper electric kettle weighing 1000 g contains 900g of water at `20^(@)C` it takes 12 minutes to raise the temperature to `100^(@)C`. If electric energy is supplied at 210V, calculate the strength of the current, assuming that 10% heat is wasted. Specific heat of copper is 0.1.

A copper electrical kettle weighing 1 kg contians 0.5 kg of water at 20@C . It takes 10 minutes to raise the temperature to 100^@C . If the electric energy is supplied at 220V, calculate the strength of the current,assuming that 20% heat is washed. Specific heat of copper is 0.1.

A copper kettle weighing 1000g holds 1900g of water at 19^(@)C. it takes 12 minutes to raise the temperatureto 100^(@)C . If energy is supplied is supplied at 210V, calculate the strength of current assuming that 10% of heat is wasted. Secific heat of copper =0.1"cal" g^(-1)C^(-1) .

A vessel made of copper weighs 1 kg and it contains 1 kg of water at 10^(@)C . How much coal will be required to raise the temperature of this water to 100^(@)C ? On burning 1 kg of coal, 10^(4) cal of heat can be produced and 40% of this heat is lost. Specific heat of copper ="0.09 cal.g"^(-1).^(@)C^(-1) .

50 g of copper is heated to increase its temperature by 10^@C . If the same quantity of heat is given to 10g of water, the rise in its temperature is (specific heat of copper =420J//kg^(@)//C )

50 g of copper is heated to increase its temperature by 10^@C . If the same quantity of heat is given to 10g of water, the rise in its temperature is (specific heat of copper =420J//kg^(@)//C )

50 gm of copper is heated to increase its temperature by 10^(@)C. If the same quantity of heat is given to 10 gm of water, the rise in its temperature is (Specific heat of copper =420 Joule-kg^(-1)@C^(-1)

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.

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.