1.

The magnetic flux linked with a coil, in webers, is given by the equation phi_(B) = 3t^(2) + 4t + 9. The magnitude of induced emf at t = 2s will be

Answer»

2V
4V
8V
16V

Solution :`phi_(B)=3t^(2)+4t+9`
`|epsi|=(d phi_(B))/(DT)=6t+4`
`|epsi| ("at t=2s")=6 XX 2+4=16V`


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