Answer Happy

1. (30 points) A circular loop of wire of radius r= 1.0 m is placed in a region where an external uniform magnetic field is perpendicular to the plane of the loop. The external magnetic field vector points in, perpendicular to the page. During the course of 0.150 seconds, the field magnitude B is DECREASED uniformly (i.e., linearly in time) from 0.64 T to 0.25 T. (a) (5 points) What is the direction of the induced current i in the loop, clockwise or counterclockwise. Please indicate this direction by drawing a curved arrow at the wire. (b ) (5 points) What is the direction of the induced magnetic field, in or out? Circle one. (c) (10 points) What is the magnitude of the average induced electromotive force (emf)? (d) (10 points) If the resistance of the wire is 2.00 ohms, then what is the magnitude of the induced current? How much heat is created in a period of 1.0 minute? Hint: Get the rate of heat production, then multiply by the time after converting to seconds. B-vector in wie loop