Current Electricity Charging Discharging Of Capacitors Question 552
Question: Three bulbs of 40 W, 60 W, 100 W are arranged in series with 220 volt supply which bulb has minimum resistance
[Pb. PET 2000]
Options:
A) 100 W
B) 40 W
C) 60 W
D) Equal in all bulbs
Show Answer
Answer:
Correct Answer: A
Solution:
$ P _{Rated}=\frac{V _{Rated}^{2}}{R} $
Therefore $ R\propto \frac{1}{P _{Rated}} $ (V - constant) So bulb of high power will have less resistance.
BETA
