Question

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)​

Answer 1

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