Question 284: Electrostats & Capacitance

Question

A parallel plate capacitor is of area 6 cm2
 and a separation 3 mm. The gap is filled with three dielectric
materials of equal thickness (see figure) with dielectric constants K1 = 10, K2 = 12 and K3 = 14. The dielectric constant of a material which when fully inserted in above capacitor, gives same capacitance would be -

Accepted Answer

Let dielectric constant of material used be K.
$$ 	herefore $$  $${{10{ \in _0}\,A/3} \over d} + {{12{ \in _0}\,A/3} \over d} + {{14{ \in _0}\,A/3} \over d} = {{K{ \in _0}A} \over d}$$
$$ \Rightarrow $$    K $$=$$ 12

Answer

12

Answer

36

Answer

14

Answer

4

Electrostats & Capacitance

Choose the correct answer: