Question

Statement I: If three identical bulbs are connected in series as shown in figure, then on closing the switche bulb $C$ is short circuited and hence illumination of bulbs $A$ and $B$ decreases.

Statement II: Voltage on $A$ and $B$ decreases.

• A. If both statements are true and statement II is the correct explanation of statement I.
• B. If both statements are true but statement II is not the correct explanation of statement $I$.
• C. If statement $I$ is true but statement II is false.
• D. If both statements are false.

Answer 1

Answer: (D)

When switch $S$ is closed, bulb $C$ is short circuited, so voltage $V$ distributes only in two parts i.e., voltage on Bulb $A$ and $B$ increases as compared previously. Hence, illumination of bulb $A$ and $B$ increases.