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The electric flux density of a surface with permittivity of 2 is given by 12 units. What the flux density of the surface in air?(a) 24(b) 6(c) 1/6(d) 0This question was posed to me in an online quiz.My enquiry is from Boundary Conditions in portion Electric Fields in Material Space of Electromagnetic Theory

Answer»

The correct OPTION is (B) 6

Explanation: The relation between ELECTRIC field and permittivity is GIVEN by Dt1/Dt2 = ε1/ε2. Put Dt1 = 12, ε1 = 2 and ε2 =1, we get Dt2 = 12 x 1/ 2 = 6 units.



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