Question

The power in an electrical circuit is given by the equation P= RR, where /is

the current flowing through the circuit and Ris the resistance of the circuit.
What is the power in a circuit that has a current of 0.02 amps and a
resistance of 30 ohms?

Answer 1

Equation of power in a electrical circuit is given as:

`\bf P = I^2R`

I → Current flowing through the circuit.

R → Resistance of the circuit

We need to calculate power when;

Current (I) = 0.02 A

Resistance (R) = 30 Ω

By substituting values in the equation, we get:

`\rm \longrightarrow P = (0.02)^2 * 30 \\ \\ \rm \longrightarrow P = 0.0004 * 30 \\ \\ \rm \longrightarrow P = 0.012 \: W`

`\therefore` Power in the circuit = 0.012 W