In figure above, all the bulbs are identical. The bulb that lights most brilliantly is

1 only

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2 only

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2 and 4

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1 and 5

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Solution

The correct option is D 1 and 5
Intensity of bulb is proportional to current passing through that bulb.
Current in bulb 1 and 5 will be the maximum and current in bulb 2,3 and 4 will get divided.
So that bulb that light most brilliantly are 1 and 5 .

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In figure above, all the bulbs are identical. The bulb that lights most brilliantly is

The correct option is D 1 and 5Intensity of bulb is proportional to current passing through that bulb.Current in bulb 1 and 5 will be the maximum and current in bulb 2,3 and 4 will get divided.So that bulb that light most brilliantly are 1 and 5 .

The correct option is D 1 and 5
Intensity of bulb is proportional to current passing through that bulb.
Current in bulb 1 and 5 will be the maximum and current in bulb 2,3 and 4 will get divided.
So that bulb that light most brilliantly are 1 and 5 .