A condenser has a capacity 2,μ ,F and is charged to a voltage of 50, V . energy stored is

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2. Electric Potential and Capacitance

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A condenser has a capacity $2\,\mu \,F$ and is charged to a voltage of $50\, V$. The energy stored is

A

$25 \times 10^5$ $Joule$

B

$25$ $Joule$

C

$25 \times 10$ $erg$

D

$25 \times 10^3$ $erg$

Solution

(d) $U = \frac{1}{2}C{V^2} = \frac{1}{2} \times 2 \times {10^{ – 6}} \times {(50)^2} = 25 \times {10^{ – 4}}\,J$
$ = 25 \times {10^3}\,erg$

Standard 12

Physics

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