Question

An electric lamp whose resistance is 20 ohm and a conductor of 4 ohm are connected in series to 6v battery. Find the current through the circuit and the potential difference across the electric lamp and conductor​

Answer 1

Solution

a). the total resistance of the circuit =20Ω+4Ω=24Ω

b). The current through the circuit= current through the bulb= current through the conductor.

The current through the circuit= the voltage of the batteryvoltage applied.

the current through the circuit =246amp

The current through the circuit = 0.25amp

c). The potential difference across the lamp and the conductor.

(i) The potential difference across the electrical lamp =0.25×20=5volt

(ii) The potential difference conductor =0.25×4=1 volt

d).  Power can be calculated as current through the lampvoltage across the lamp

     power=0.255→20W.