Two identical bulbs,A and B,are connected in an electrical circuit as shown in the figure.R is the resistance connected in series with the each bulb.Initially they are glowing with equal intensity.Bulb A is removed from the socket;the potential difference across the empty socket A will
A)decrease.
B)increase.
C)not change.
D)become zero.

Question

Two identical bulbs,A and B,are connected in an electrical circuit as shown in the figure.R is the resistance connected in series with the each bulb.Initially they are glowing with equal intensity.Bulb A is removed from the socket;the potential difference across the empty socket A will 
A)decrease. 
B)increase. 
C)not change. 
D)become zero.

Quizplus · Accepted Answer

When the bulb A is removed from the socket, the resistance in the circuit increases because there is one less bulb providing resistance. This means that the potential difference across the remaining bulb B will increase, resulting in an increase in the intensity of bulb B.

Two Identical Bulbs,A and B,are Connected in an Electrical Circuit