The current needs to be up since the field of the magnet is going into the south pole.
Suppose I point my right-hand fingers at the magnet, and have the thumb in the upward direction, then my palm will point left. The direction of the push is where my palm points.
A magnet is hung by a string and then placed near a wire as shown. When the switch is closed, the magnet rotates such that the ends of the magnet move as indicated by the arrows.
At the instant the switch is closed determine:
Part A. the direction of the current through the wire segment nearest the magnet. Explain. (Hint: Think of the magnet as a compass needle responding to the magnet field that is present.)
Part B. the direction of the force exerted by the magnet on the wire segment (assume the magnet is in the position shown). Explain.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Magnetic Force on Current-Carrying Wire concept. You can view video lessons to learn Magnetic Force on Current-Carrying Wire. Or if you need more Magnetic Force on Current-Carrying Wire practice, you can also practice Magnetic Force on Current-Carrying Wire practice problems.
What professor is this problem relevant for?
Based on our data, we think this problem is relevant for Professor Jerousek's class at UCF.