Current Electricity Charging Discharging Of Capacitors Question 550
Question: Some electric bulbs are connected in series across a 220 V supply in a room. If one bulb is fused then remaining bulbs are connected again in series across the same supply. The illumination in the room will
[J & K CET 2004]
Options:
A) Increase
B) Decrease
C) Remains the same
D) Not continuous
Show Answer
Answer:
Correct Answer: A
Solution:
$ P=\frac{V^{2}}{R} $
Therefore
Therefore $ P\propto \frac{1}{R} $ (V - constant) \ When one bulb will fuse out resistance of the series combination will be reduced. Hence from $ P _{Consumed}\propto \frac{1}{R} $ illumination will increase.
BETA
