First slide

Alternating Current and voltage

Question

A bulb is connected first with dc and then ac of same voltage then it will shine brightly with

Moderate

A

AC
B

DC
C

Brightness will be in ratio 1/1.4
D

Equally with both

Solution

Brightness $\propto P_{consumed} \propto \frac{1}{R}$ for Bulb, $R_{ac} = R_{dc},$ so brightness will be equal in both the cases.

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