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What is the potential difference between 10sinθcosφ/r^2 at A(1,30,20) and B(4,90,60)?

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What is the potential difference between 10sinθcosφ/r^2 at A(1,30,20) and B(4,90,60)? (a) 2.386 (b) 3.386 (c) 4.386 (d) 5.386 The question was asked during a job interview. Origin of the question is Electric Potential in chapter Electrostatic Fields of Electromagnetic Theory Select the correct answer from above options Electromagnetic Theory questions and answers, Electromagnetic Theory questions pdf, Electromagnetic Theory question bank, Electromagnetic Theory questions and answers pdf, mcq on Electromagnetic Theory pdf,electromagnetic theory book pdf,electromagnetic theory pdf notes,electromagnetic theory lecture notes,electromagnetic theory of light,maxwell electromagnetic theory,electromagnetic theory proposed by,electromagnetic theory engineering physics,electromagnetic theory nptel

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Correct answer is (c) 4.386 The explanation is: Potential at A, Va = 10sin30cos20/1^2 = 4.6985 and Potential at B, Vb = 10sin90cos60/4^2 = 0.3125. Potential difference between A and B is, Vab = 4.6985 – 0.3125 = 4.386 volts.

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