The charge flowing in a conductor varies with times as `Q = at - bt^2.` Then, the current

The charge flowing in a conductor varies with times as `Q = at - bt^2.` Then, the current
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The charge flowing in a conductor varies with times as `Q = at - bt^2.` Then, the current A. reaches a maximum ... rate of `(-2b)` D. Both (b) and (c)
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