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Q.

Electric field inside the given capacitor with dielectric is E and dielectric constant of material is K. The charge density on the plates is  n×10-5 Cm2 . Find the value of n. (Given E = 6 x 105 V/m, K =6

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a

4.18

b

2.18

c

3.18

d

1.18

answer is A.

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Detailed Solution

 E=σε0K ;  6 x 105      =σ8.85 x 10-12 x 6 σ  = 36 x 8.85 x 10-12 x 105 Cm2      = 3.18 x 10-5 Cm2

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