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Question

A circuit with a bulb, a switch and two identical cells is shown in the image. The bulb in the circuit does not glow.

Which of the following labelled parts is responsible for this?


A
4
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B
2
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C
3
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D
1
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Solution

The correct option is B 3
All electric cells have two terminals, positive and negative terminal. When multiple cells are used, the positive end of one cell should be connected to the negative end of the other cell. If they are incorrectly connected, the cells will cancel out each other effects. So, in the figure the issue is at label 3.

Physics

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