Two circuits are shown below with resistances connected in series and in parallel. In which of the following cases will the brightness of the bulb be the least?

Case I

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Case II

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Brightness of the bulb will remain the same.

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Solution

The correct option is A Case I
In series connection, as the net resistance is greater as compared to parallel connection, less current will flow through the bulb. Hence, the bulb will glow with less brightness in case I.

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Two circuits are shown below with resistances connected in series and in parallel. In which of the following cases will the brightness of the bulb be the least?

The correct option is A Case IIn series connection, as the net resistance is greater as compared to parallel connection, less current will flow through the bulb. Hence, the bulb will glow with less brightness in case I.

The correct option is A Case I
In series connection, as the net resistance is greater as compared to parallel connection, less current will flow through the bulb. Hence, the bulb will glow with less brightness in case I.