Question

an electric heater is rated 1500 watts then work done by it in hour is

Answer 1

1500*60*60 joules is answer

Answer 2

Seems like your question is incomplete.

Here is the complete question.

Question :- An electric heater is rated 1500 watt. If electric power cost Rs. 2 per kilo watt hour then the cost of power of 10 hour running of the heater is?

Answer is given below.