Question

Three identical charged capacitors each of capacitance 5uf are connected as shown in figure. Potential difference across capacitor (3) long time after the switches K1 and K2 are closed, is

Answer 1

Answer:

Long time after closing the key the potential difference across the capacitor becomes zero

Explanation:

Let q charge flows out from capacitor 1 and 2 and enters into capacitor 3

so we will have kirchoff's loop law

$\frac{100 - q}{C} + \frac{100 - q}{C} + \frac{100 - q}{C} = 0$

$100 - q = 0$

$q = 100$

So final charge on each capacitor will be

$Q = 100 - 100 = 0$

now potential across each capacitor is given as

$V = \frac{q}{C}$

$V = 0$

#Learn

Topic : Capacitors and dielectrics

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