1 kilowatt hour (kWh) is equal to ___________.

The correct answer is Option (2) → \(3.6\times10^{6}\) joules

A kilowatt hour is the energy used by a 1 kW appliance running for 1 hour. Energy \(=\) power \(\times\) time, with power in watts and time in seconds:

• 1 kW \(=1000\) W and 1 h \(=3600\) s

• 1 kWh \(=1000\times3600=\) \(3.6\times10^{6}\) J