Current Electricity Ques 103
103. Forty electric bulbs are connected in series across a $220 V$ supply. After one bulb is fused the remaining 39 are connected again in series across the same supply. The illumination will be
[1989]
(a) more with 40 bulbs than with 39
(b) more with 39 bulbs than with 40
(c) equal in both the cases
(d) in the ratio $40^{2}: 39^{2}$
Show Answer
Answer:
Correct Answer: 103.(b)
Solution:
- (b) Since, the voltage is same for the two combinations, therefore $H \propto \frac{1}{R}$. Hence, the combination of 39 bulbs will glow more.
BETA
