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2. Electric Potential and Capacitance
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જો ગોળાનો પરીઘ $2\,m$ હોય તો પાણીમાં ગોળાનું કેપેસીટન્સ...$pF$
A
$2700$
B
$2760$
C
$2780$
D
$2828$
Solution
આપેલ છે $2\pi R\,\, = \,\,2\,\, \Rightarrow \,\,R\,\, = \,\,\frac{1}{\pi }$
ગોળા માટે $C = 4\pi \varepsilon _0KR$
$ \Rightarrow \,\,C\,\, = \,\,\frac{1}{{9\,\, \times \,\,{{10}^9}}}\,\, \times \,\,\frac{1}{\pi }\,\, \times \,\,80\,\, \Rightarrow \,\,C\,\, = \,\,2828.28\,\,pF$
Standard 12
Physics
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