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Q.

There is an air filled 1 pF parallel plate capacitor. When the plate separation is doubled and the space is filled with wax, the capacitance increases to 2 pF. The dielectric constant of wax is

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a

2

b

4

c

6

d

8

answer is B.

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Detailed Solution

C=ε0Ad=1pF and C′=Kε0A2d=2pF ∴K=4

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