First slide

Capacitance

Question

Total energy stored in the condenser system shown in Fig. 3. 76 will be :

Moderate

A

2 μJ
B

4 μJ
C

8 μJ
D

16 μJ

Solution

Total capacity = $2 + \frac{6 x 3}{6 + 3} = 4 μF$
Total energy stored in system = $\frac{1}{2} (4 x 10^{- 6}) {(2)}^{2} = 8 x 10^{- 6} J$

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