Chapter 4: Q12E (page 1013)
The inductor shown in Figure has inductance 0.260 H and carries a current in the direction shown. The current is changing at a constant rate. (a) The potential between points a and b is Vab = 1.04 V, with point a at higher potential. Is the current increasing or decreasing? (b) If the current at t = 0 is 12.0 A, what is the current at t = 2.00 s?
Short Answer
a) the current is decreasing whereas the emf is directed to oppose this decrease.
b) the current at t = 2 sec is 4.00 amperes.