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Calculate the distance between the plates of the capacitor having C=20F, actual permittivity = 5F/m n=3 and A=4m^2.(a) 1m(b) 2m(c) 3m(d) 4mI got this question in an interview.The query is from Capacitance of a Multi Plate Capacitor in section Capacitance and Capacitors of Basic Electrical Engineering

Answer»

Correct choice is (b) 2m

To EXPLAIN: The formula for capacitance of a MULTI plate capacitor: C=Actual permittivity*(n-1)*A/d.

Substituting the GIVEN VALUES in the equation, we GET d=2m.



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