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i have posted my question as an attachement. Kindly refer to that .

i have posted my question as an attachement.  Kindly refer to that .

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Grade:10

1 Answers

Eshan
askIITians Faculty 2095 Points
5 years ago
When S is closed, Y and Z become parallel and so the resistance whole circuit decreases, resulting in larger from the batteryto the lamp X. Hence X glows brigher.

Also since the resistance of the Y-Z combination decreases, smaller potential difference appears across the comination as compared to when Y was alone. Hence Y glows dimmer.

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