Question

The flux linked with a coil at any instant 't' is given by
Φ = 10t² – 50t + 250. The induced emf at t = 3s is
(a) –190 V (b) –10 V (c) 10 V (d) 190 V

Answer 1

Answer:

please mark me as brain list

Explanation:

Farady's law states that time varying magnetic flux can induce an e.m.f.

E = Electric field induced

E=−

dt

dϕ

E(t)=−

dt

d(10t

2

−50t+250)

=−(20t−50)V

E(t=3s)=−(20(3)−50)V=−10V