A bulb is connected first with dc and then ac of same voltag... | PHYSICS - POWER IN AC CIRCUIT - THE POWER FACTOR | SolveeIt | Solveeit

Today, August 18

Question

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

A

AC

B

DC

C

Brightness will be in ratio 1/1.4

D

Equally with both

Answer

Equally with both

Explanation

Solution

Brightness ∝ $P _ { \text {consumed } } \propto \frac { 1 } { R }$ for Bulb, $R _ { a c } = R _ { d c }$ so brightness will be equal in both the cases.