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In the circuit diagram, all the bulbs ar...

In the circuit diagram, all the bulbs are identical. Which bulb will be the brightest ?

A

A

B

B

C

C

D

D

Text Solution

Verified by Experts

The correct Answer is:
C
(c ) As all bulbs are identical, the power (related to brightness) is most useful as `P = I^(2) R`, So the resistor with most current will be brightest. As bulb `C` has the same current as the through the battery, while the branches with bulbs `A, B` and `D` are in parallel and have the total current split between the branches, the current through bulb `C` is greatest.
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