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The potential difference across a 2-H inductor as a function of time is shown in Fig. At time t = 0, current is zero. The variation of current versus time isA. a straight lineB. a parabolaC. a hyperbolaD. expotential |
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Answer» Correct Answer - B For `t le 1s` `V_(L)=8t` `Ldi=V_(L)dt` `int Ldi = int 8t dt` `Li =(8t^(2))/(2) = 4t^(2)` `i=2t^(2)` so current versus time graph is a parabola For `1s le t le 2s` ltbtgt `V_(L) = 16 -8t` `int Ldi=int (16-8t)dt` `Li = 16t-(8t^(2))/(2)` `i=8t - 2t^(2)` so i-t graph in a parabola. so, for entire time shown, i-t graph in a parabola. |
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