One day the meter reading was 7643 units while on the following day, it was 7657 units. What is the consumption of electricity in a day?

A source of potential difference V volt sends current I ampere in a circuit for time t second. Write expressions for

(a) electrical energy supplied by the source, and

(b) electrical power spent by the source.

If an appliance of power P watt is used for time t hour, how much electrical energy is consumed in kWh?

What is an electric fuse? State its purpose in the household electrical circuit?