The magnetic flux linked with a coil changes with time t as = (8 t ^ 2 +5 t +7 ) , where…
Physics · Class 12 · CBSE — Electromagnetic Induction
The magnetic flux linked with a coil changes with time \(t\) as \(\phi=\left(8 {t}^{2}+5 {t}+7\right)\) , where t is in seconds and \(\phi\) is in Wb. The value of emf induced in the coil at \(t=4 {~s}\) is:
- 32 V
- 37 V
- 64 V
- 69 V
Answer
(D) 69 V
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