Which one of the following is the value of 1 kWh of energy converted into joules?

Options

A. `1.8xx10^6 J`
B. `3.6xx10^6 J`
C. `6.0xx10^6 J`
D. `7.2xx10^6 J`

Answer

B

Explanation

kWh (kilowatt-hour) and Joules are two energyunits. 1 watt is defined as 1 joule/second. So if you multiply a watt times seconds, you get Ws which is also a joule. So lkW is 1000W, and an hour is 60 seconds `xx` 60 minutes.
So lkWh = 3600 kWs = 3,600,000 Ws = 3,600,000J
So lkWh=`3.6xx10^6J`