Q. 35.0( 3 Votes )

Suppose, one wishes to construct a 1.0-f capacitor using circular discs. If the separation between the discs be kept at 1.0 mm, what would be the radius of the discs?

Answer :

Given:


C = 1 F


d=1 mm


Formula used :


Capacitance is given by



Where


C is the capacitance of the capacitor


D is the separation between the capacitor plates


A is the area of a circular plate capacitor


ε₀ is the permittivity of the free space=8.85×10-12 F/m


A = area of the circle =.Because capacitor plates are circular discs.






=6×103 m=6000 m=6 km


For the construction of 1F capacitor with 1mm separation, we need to take the radius r=6 Km.


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