A certain household consumes 650 units of electricity in a month. How much is this electricity in joules?

Energy equal to one kwh is termed as one unit.

So 650 units equal to 650 kwh.

Now 1 kwh = 3.6 × 10⁶

So,

650kwh = 650 × 3.6 × 10⁶

= 2340 × 10⁶