The magnetic flux linked with a coil is given by an equation \( \phi \) (in webers) \( =8 t^{2}+....

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The magnetic flux linked with a coil is given by
P
an equation \( \phi \) (in webers) \( =8 t^{2}+3 t+5 \). The induced e.m.f. in the coil at the fourth second will be
(1) 16 units
(2) 39 units
(3) 67 units
(4) 145 units


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