Question

The circuit is working, and all three bulbs are lit. If a switch at C is opened, what will happen to the circuit?

A. All three bulbs will stay lit.
B. Bulbs 2 and 3 will go out, but bulb 1 will remain lit.

C. Bulb 3 will go out, but bulbs 1 and 2 will remain lit.

D. All three bulbs will go out.

Answer 1

The correct answer is option D. All three bulbs will go out.

In the circuit, all the bulbs are connected in series with each other. When the switch at C is opened, the circuit is broken (consider the wire is broken). It is shown in diagram as well (attached).

Hence, when the circuit is broken, the current will not reach the bulbs 2 & 3. And, the connection will be disrupted, So all the bulbs will blow out.

Hence, D is the correct option. 

Answer 2

Answer:

all three bulbs will go out

Explanation:

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