1.

The magnetic flux linked with a coil is given by an equation \[\varphi \] (in webers) = \[8{{t}^{2}}+3t+5\]. The induced e.m.f. in the coil at the fourth second will be                                                       [MP PET 1990]

A.            16 units                                  
B.            39 units
C.            67 units                                  
D.            145 units
Answer» D.            145 units


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