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Find the charge density when the electric flux density is given by 2x i + 3y j + 4z k.

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in Electromagnetic Theory by (188k points)
Find the charge density when the electric flux density is given by 2x i + 3y j + 4z k.

(a) 10

(b) 9

(c) 24

(d) 0

I have been asked this question by my school principal while I was bunking the class.

My enquiry is from Maxwell Law in division Magnetostics of Electromagnetic Theory

1 Answer

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The correct answer is (b) 9

Easy explanation: The charge density is the divergence of the electric flux density by Maxwell’s equation. Thus ρ = Div (D) and Div (D) = 2 + 3 + 4 = 9. We get ρ = 9 units.

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