the magnetic flux linked with a coil 4t²+6t+9 Wb, where t is the time (In sec) the emf infused in the coilat t =2s is (in v)
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Answer:
It is given that: ϕ=4t
2
+6t+9 Wb
Emf induced in the coil is equal to the rate of change of flux through it.
Thus, emf induced =
dt
dϕ
=8t+6
Thus, emf induced at (t=2s)=8(2)+6=22 V
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