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Find the current when the charge is a time function given by q(t) = 3t + t^2 at 2 seconds.(a) 3(b) 5(c) 7(d) 9The question was asked in an interview for internship.My doubt stems from Continuity Equation topic in division Electric Fields in Material Space of Electromagnetic Theory

Answer»

Right choice is (C) 7

Explanation: The current is defined as the rate of change of charge in a circuit ie, I = dq/dt. On differentiating the charge with respect to TIME, we GET 3 + 2t. At time t = 2s, I = 7A.



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