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If an electric field vector E exists in a material whose dielectric constant is K, and ε0 denotes the permittivity of free space, which expression gives the electric displacement vector?

1. K E / ε0
2. E / K ε0
3. ε0 E / K
4. K ε0 E

Correct answer: K ε0 E

Solution

The electric displacement vector is D = epsilon*E = K*eps0*E, where K is the dielectric constant.

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