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The e.m.f. In an A.C. circuit at any instant is `E=200 sin[100 pit+(pi)/6]` volt. The time when the voltage become maximum for the first time isA. `1/10 s`B. `1/100 s`C. `1/200 s`D. `1/300 s` |
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Answer» Correct Answer - D `E = 200 sin [100 pi t + (pi)/6]` will be maximum, when `sin[100 pi t+(pi)/6] = 1 = sin(pi)/2` `:. 100 pi t +(pi)/6 = (pi)/2` `:. 100 pi t = (pi)/2 - (pi)/6 = (pi)3 :. T = 1/300 s`. |
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