1. A current of 1 ampere flows in a series circuit containing an electric lamp and a conductor of 5 Ω when connected to a 10 V battery. Calculate the resistance of the electric lamp. Now if a resistance of 10 Ω is connected in parallel with this series combination, what change (if any) in current flowing through 5 Ω conductor and potential difference across the lamp will take place? Give reason.

Question

1.	A current of 1 ampere flows in a series circuit containing an electric lamp and a conductor of 5 Ω when connected to a 10 V battery. Calculate the resistance of the electric lamp. Now if a resistance of 10 Ω is connected in parallel with this series combination, what change (if any) in current flowing through 5 Ω conductor and potential difference across the lamp will take place? Give reason.

MyClass24 · Accepted Answer

Soln:

Let R be the resistance of the electric In series total resistance = 5 + R I = v/r

1 = 10/5+R
R = 5 ohm

V across Lamp + conductor = 10 V

V acoess Lamp = I &times; R = 1 * 5 = 5 Volt