Question

1. Define the following:
i. Electric current
Ii. Voltage
iii. Power

2. Derive an expression relating them, state the instrument for the measurement of each

Answer 1

1)n

i) Electric current: is the measure of the flow of electrons from one point to another in an electric circuit.

ii) Voltage: is the pressure that pushes electrons around a circuit.

iii) Power: is the rate at which work is done in an electrical circuit.

2)

$Power(W)=Voltage(V)\times{Current(A)}$

Voltage is measured with a voltmeter.

Current is measured with an Ammeter

Power is measured with a Wattmeter.