Question

In what unit does the domestic electric meter measure the electrical energy consumed? State the value of unit in $S.I$ unit.

Answer 1

1. The domestic electric meter measures electrical energy in kilowatt hour $\left(kWh\right)$.
2. The $S.I$ unit of electrical energy is $\left(kWh\right)$ that is kilowatt hours.
3. $1$ kilowatt-hour ($\left(1kWh\right)$$=1$$kilowatt$$\times 1$$hour$
   $=1000watt\times 1hour$
   $=1000{Js}^{-1}\times (60\times 60s)$
   $=3.6\times {10}^{6}J$in $S.I$ unit.
   Thus, $1kWh=3.6\times {10}^{6}J$.