Power Measurement | MCQs

Explanation

The SI unit of power is the watt (W). 

Explanation: A watt is equal to one joule of work done per second. 

Key points:

Symbol: W

Definition: 1 watt = 1 joule per second

Named after: James Watt 

Explanation

Power refers to the rate at which energy is supplied or converted by the appliance or circuit.

It is measured in watts (W) and indicates the energy usage or generation per unit of time.

Explanation

1 kilowatt-hour (kWh) is equivalent to 3.6 million joules (MJ).

As it represents the energy used when 1 kilowatt of power is consumed for 1 hour.

Explanation

Volt x Ampere is the measure of power.

Specifically, it represents electrical power in watts (W), where power (P) is calculated using the formula 

P=V×I, with V being voltage and I being current.