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Q.
In the circuit diagram, all the bulbs are identical. Which bulb will be the brightest?
Current Electricity
Solution:
As all bulbs are identical and the power (related to brightness) is given as $P=I^{2} R$, so the resistor with the most current will be brightest. As bulb $C$ has the same current as that 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.
