if the radius of circular capacitor plates is doubled,the c of capacitor will increase by a factor of 4.explain

Dear student,

 

Capacitance = ε A / d

 

Here, in case of circular plates, A = pi r^2

 

Hence, we see that c is proportional to square of r

 

so, if  r is doubles, C increases by 4 times.

 

Hope this helps.

 

Thanking you

Team

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