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The magnetic flux linked with a coil var...

The magnetic flux linked with a coil varies as `phi=3t^(2)+4t+9.` Find the magnitude of the emf induced at t = 2S.

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Induced emf =`-(dphi)/(dt)`
`=-d/(dt)(3t^2 + 4t+9)`
=-(6t+4) volt
Induced emf at t =2 ,
e=-(6 x 2 +4) =-16 V
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