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} $



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