QUESTION 2 (a) With the aid of diagrams, differentiate linear polarization from circular polarization. (b) Derive the general equation for electromagnetic wave from Maxwell's equations. (c) A bar magnet is moved

rapidly toward a 40-turn circular coil of wire. As the magnet moves, the average value of Bcose over the area of the coil increase from 0.0125T to 0.45 T in 0.250 s. If the radius of the coils is 3.05 cm, and the resistance of its wire is 3.55 2, find the magnitude of (a) the induced emf and (b) the induced current.