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Calculate the electric field intensity of a line charge of length 2m and potential 24V.

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Calculate the electric field intensity of a line charge of length 2m and potential 24V.

(a) 24

(b) 12

(c) 0.083

(d) 12.67

This question was addressed to me in an international level competition.

Question is taken from Method of Images in section Electrostatic Boundary Value Problem of Electromagnetic Theory

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The correct option is (b) 12

To explain I would say: The electric field intensity is given by the ratio of potential to distance or length. E = V/d = 24/2 = 12 V/m.

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