Current Electricity Ques 112
- A $25$ $ W$ and a $100$ $ W$ bulb are joined in series and connected to the mains. Which bulb will glow brighter?
(1979)
Show Answer
Answer:
Correct Answer: 112.$( 25$ W bulb $)$
Solution:
Formula:
- In series current is same. Therefore, from the relation $P=i^{2} R$, a bulb having more resistance consumes more power or glows brighter. $25$ $ W$ bulb has more resistance $(R=\frac{V^{2}}{P})$ compared to $100 $ $W$ bulb. Hence, it will glow brighter.
BETA
