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The magnetic flux `(phi)` linked with a coil depends on time `t` as `phi=at^(n)` , where a and `n` are constants. The emf induced in coil is `e` . (i) If `0ltnltI,e=0` (ii) If `0ltnltI,een0` and `|e|` decreases with time (iii) If `ngtI,e` is constant (iv) If `nltI,|e|` increases with timeA. `(i),(iii)`B. `(ii), (iii), (iv)`C. `(i), (ii)`D. `(ii), (iv)` |
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Answer» Correct Answer - D `phi=at^(n)` `|e|=ant^(n-1)` For `0ltnlt1` , `|e|=(an)/(t^(1-n))` As `n` increases from `0` to `1` , `|e|` decreases For `ngt1` , `|e|=ant^(n-1)` , `|e|` increases |
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