Comment
Share
Q)

# A (current vs time) graph of the current passing through a solenoid is shown in the fig. For which time is the back electromotive force (u) a maximum? If the back emf at t = 3s is e, find the emf at t = 40s

(a) I = e
(b) I = -e
(c) $\pm e$
(d) 0