If bulb B is removed from Circuit 1, what will happen to bulbs A and C? If bulb

Question

If bulb B is removed from Circuit 1, what will happen to bulbs A and C?

If bulb B is removed from Circuit 3, what will happen to bulbs A and C?

If bulb B is removed from Circuit 4, what will happen to bulbs A and C?

      A stays the same
A goes out
A gets brighter
A gets dimmer
C stays the same
C goes out
C gets brighter
C gets dimmer If bulb B is removed from Circuit 1, what will happen to bulbs A and C? If bulb B is removed from Circuit 3, what will happen to bulbs A and C? If bulb B is removed from Circuit 4, what will happen to bulbs A and C?

Explanation / Answer

B is removed in circuit 1 :

A gets brighter

C gets brighter

Reason :Bulb A , B and C are in series in circuit 1. as Bulb B is removed , the resistance of the circuit decreases which in turn increase the current in the circuit. since same current flows in bulbs in series, hence the current increases in A and C and hence they become brighter.

bulb B is removed from Circuit 3, :

A gets dimmer

C gets brighter.

Reason :

As bulb B is removed , the total resistance of the circuit increases which decreases the overall current coming from the battery. Bulb A is in series with battery and hence less current flows through bulb A now . For Bulb C the current increases since the current is not been divided among one or more resistors now. hence C gets brighter.

bulb B is removed from Circuit 4:

A stays the same

C gets brighter

Reason :

The Bulb A is in parallel with the battery. hence removing the Bulb B does not change the Voltage across Bulb A and hence brightness of bulb A remains same.

As bulb B is removed the Voltage across C increases since B and C were in series. hence brightness of bulb C increase.

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