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The magnetic flux `(phi)` linked with the coil depends on time `t` as `phi=at^(n)`, where `a` and `n` are constants. The emf induced in the coil is `e`A. If `0 lt n lt 1, e ne 0` and |e| decrease with timeB. If `n = 1`, e is constantC. If `n gt1, |e|` increase with timeD. None of these |
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Answer» Correct Answer - 4 `phi = "at"^(n)` `e = (dphi)/(dt) = "nat"^(4-1)` If `0 lt n lt 1` power of t is - ve hence `tdarreuarr` If n=1 , `phi`= at , `e=(dphi)/(dt) = a` If `n gt 1` So from the expression `e = nat^(n-1)` `edarr as t uarrs` |
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