The current in a 20.0-mH inductor changes with time as *I* = 2.00*t*^{2} − 5.00*t*, where *I* is in amperes and *t* is in seconds.

(a) Find the magnitude of the induced emf at

mV

(b) Find the magnitude of the induced emf at

mV

(c) At what time is the emf zero?

s

*t*= 1.00 s.(b) Find the magnitude of the induced emf at

*t*= 4.00 s.(c) At what time is the emf zero?