Electricity (C10)

Consider the given circuit and find the current flowing in the circuit and potential difference across the 15 Ω resistor when the circuit is closed.

Answer

Total resistance of the circuit

R = R1 + R2 + R3 = 5 + 10 + 15 = 30 ohm

Potential difference across the circuit using By ohm’s law

V = IR

I = V/R

I = 30 V / 30 Ω = 1 A

Potential difference across 15 ohm resistor = 1 A × 15 ohm = 15 volt