Question

The circuit is working, and all three bulbs are lit. If a switch at A is opened,
what will happen to the circuit?
A
B
Cc
O
A. Bulbs 1 and 2 will go out, but bulb 3 will remain lit.
O
B. Bulb 1 will go out, but bulbs 2 and 3 will remain lit.
O
c. All three bulbs will stay lit.
O
D. All three bulbs will go out

Answer 1

the answer is d because once one part of the power is cut off all of it goes out

Answer 2

If a switch at A is opened,  Bulb 1 will go out, but bulbs 2 and 3 will remain lit.

What is parallel and series combination?

Parallel combination : When two or more resistances are connected between the same two points, they are said to be connected in parallel combination. In parallel combination , current get divided and voltage across the circuit remains same .

In a series combination the electric components are connected end to end along a same line . In series combination current remain same in whole circuit but voltage get divided.

It can be observed from the diagram that all three bulbs are connected in parallel combination not in series , hence current will divide in each branch and voltage remain same across each bulb . Current will flow in each branch except in the branch where bulb 1 is connected because   switch A is open . Since, in branches where bulb 2 and 3 are connected current is flowing and circuit is complete , both the bulbs will glow except bulb 1.

correct option will be : B)  Bulb 1 will go out, but bulbs 2 and 3 will remain lit.

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