quiz 10

• Consider area with magnetic field directed due north. Magnetic field is uniform in spaceand decreasing in magnitude with time. Direction of induced electric field as looked fromsouth is:

  clockwise
• A loop of wire lies flat on a horizontal surface. A bar magnet is held above the center of aloop with the north pole pointing down. Magnet is released. As magnet approaches theloop of wire, the induced current in this wire is

  counterclockwise
• Two conducting loops are placed on the horizontal surface in uniform magnetic fielddirected vertically down. Loop #1 has radius R, loop #2 has radius 2R. Magnetic field isincreasing in magnitude. Direction of induced emf force as viewed from above in theseloops is

  counterclockwise
• Two conducting loops are placed on the horizontal surface in uniform magnetic fielddirected vertically down. Loop #1 has radius R, loop #2 has radius 2R. Magnetic field isincreasing in magnitude. The magnitude of EMF is the loop #2 is

  Four times as big as in loop #1
• Magnetic field in some area is changing following the pattern: first two seconds it isoriented to north and decreases from 2T to 0. Second two seconds it is increasing from 0T to 2 T but pointing due south (draw the graph it helps!). As watched from the southdirection of induced electric field is

  Clockwise