Question

Answer questions 1-3 with clockwise, counterclockwise, or zero. Show your work.

1. A loop of wire is oriented horizontally, so that a vector normal to the loop is oriented downward. An external magnetic field is directed due west, at an angle of 14° above the horizontal. The magnitude of the field is decreasing over time. As viewed from above, the induced current is:

2. ____________________

3. A loop of wire is oriented horizontally, so that a vector normal to the loop is oriented upward. An external magnetic field is directed northeast, at an angle of 34° above the horizontal. The magnitude of the field is increasing over time. As viewed from above, the induced current is:

   ____________________

4. A loop of wire is oriented vertically, so that a vector normal to the loop is oriented to the east. An external magnetic field is directed east. The loop begins to rotate around a vertical rotation axis. As viewed from the east, the induced current is:

   ____________________

5. A circular loop of radius 1.79 m is mounted on top of a truck. Initially the truck is at rest oriented so that a vector normal to the loop points north. At this location, the Earth’s magnetic field has a magnitude of 49.6 μT and a direction of due north, 63° below the horizontal.

1. Over the course of 9.0 seconds, the truck accelerates north, so that at the end of the time interval, the truck is moving at 14.0 m/s north. Find the magnitude of the average induced emf in the loop during this time interval and the direction of the induced current, as viewed from the south.

   ६ Ind = ____________________ direction of Iind = ____________________

2. Over the course of the next 5.0 seconds, the truck turns, so that at the end of the time interval, the truck is moving at 14.0 m/s east. Find the magnitude of the average induced emf in the loop during this time interval and the direction of the induced current, as viewed from the east.

   ६ Ind = ____________________ direction of Iind = ____________________

Answer 1