微信联系
2024 AP Physics Preview Class

Classes begin on August 25th. Completion of Algebra 1 is required.
课程自八月二十五日起。 要求已完成代数1。

联系电话: 909-455-4508 Mr. Lin

Q:18 Current direction in loop as magnet passes through
Top Image
A bar magnet is pushed from to right completely through a loop of metal wire, as shown in the figures above. The two possible directions for current in the loop are also show. Which of the following indicate the directions of the induced current in the loop, if any, as the magnet is moving through the positions shown? Figure 1 Magnetic field direction toward right, Magnetic flux is increasing. so the current in the loop should have a magnetic field opposite to the magnetic field inside the loop. So current direction is Direction 1. Figure 2 Magnetic field direction toward right, Magnetic flux is decreasing. so the current in the loop should have a magnetic field same as the magnetic field inside the loop. So current direction is Direction 2.
Bottom Image

Share: