Question

A parallel plate capacitor is made of two dielectric blocks in series. One of the blocks has thickness and dielectric constant and the other has thickness and dielectric constant as shown in figure. This arrangement can be thought as a dielectric slab of thickness d (=) and effective dielectric constant K. The K is

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A

B

C

D

Hard
Solution
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Correct option is C)

The capacities of two individual condensers are
The arrangement is equivalent to two capacitors joined in series

Equivalent capacitance,


or

Also
From (i) and (ii)

Solve any question of Electrostatic Potential and Capacitance with:-
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