please explain step by step with equation and units

1. An inductor L = 25 mH has a current that depends on I(A) time according to the graph at right. What is the induced 8 EMF of the inductor at t = 2 s? 6 4 2 O t (s) 1 2 3 42. The shaded region in the diagram at right contains a uniform 2 mT magnetic field pointing down. Outside of the shaded region, the magnetic field is zero. The dashed B square loop shown in the diagram has a side length of 5 cm, and it is half in and half out of the shaded region. What is the current enclosed by this square loop?3. A long, hollow, cylindrical pipe carries a uniform current density X J = 200 mA/cm into the page. The pipe has an inner radius a = X X a 4 cm and an outer radius b = 6 cm. What is the magnitude of the 4 X X magnetic field a distance r = 5 cm from the center of the pipe? 6 b X X X'4. A square loop with side length L = 2 m sits in the x- y plane with its lower-left corner at the origin as shown in the diagram. A magnetic field pointing out of the page depends on x and t according to I? = thzlE, where B = 5 \":52. What is the magnitude and direction of the induced EMF in the loop at t = 3 s