Electrostatics Question 536
Question: Two condensers of capacity $ 0.3\mu F $ and $ 0.6\mu F $ respectively are connected in series. The combination is connected across a potential of$ 6volts $ . The ratio of energies stored by the condensers will be [MP PMT 1990]
Options:
A) $ \frac{1}{2} $
B) 2
C) $ \frac{1}{4} $
D) 4
Show Answer
Answer:
Correct Answer: B
Solution:
In series combination Q is constant, hence according to $ U=\frac{Q^{2}}{2C} $
therefore $ U\propto \frac{1}{C} $
therefore $ \frac{U _{1}}{U _{2}}=\frac{C _{2}}{C _{1}}=\frac{0.6}{0.3}=\frac{2}{1} $
