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Calculate the relative permittivity of the second dielectric if the relative permittivity of the first is 4. The electric field strength of the first dielectric is 8V/m and that of the second is 2V/m.

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Calculate the relative permittivity of the second dielectric if the relative permittivity of the first is 4. The electric field strength of the first dielectric is 8V/m and that of the second is 2V/m.

(a) 32

(b) 4

(c) 16

(d) 8

This question was addressed to me in unit test.

This is a very interesting question from Composite Dielectric Capacitor topic in portion Capacitance and Capacitors of Basic Electrical Engineering

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Right choice is (c) 16

Easiest explanation: The relation between the two electric fields and the relative permittivities is:

E1/E1=e2/e1. Substituting the given values, we get e2=16.

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