A conducting loop is lying flat on the ground. The north pole of a bar magnet is

Question

A conducting loop is lying flat on the ground. The north pole of a bar magnet is grought down toward the loop. As the magnet approaches the loop, will the magnetic field created by the induced current point up of down?

up

down

neither because there is no induced current

we must first know whether the approaching magnet is a bar magnet, or a horseshoe magnet.

Consider the same conducting loop and approaching magnetic north end of a bar magnet. As the magnet approaches the conducting loop, will the induced field of the loop pull on the bar magnet or push against it?

pull on magnet

push against manget

neither, as there is no induced magnetic field.

Explanation / Answer

The current in the loop will flow in anticlockwise direction , and the magnetic field created by the induced current point up.

A conducting loop is lying flat on the ground. The north pole of a bar magnet is brought down toward the loop. As the magnet approaches the loop, there will be an induced... A) magnetic field counter-clockwise around the loop. B) current clockwise around the loop. C) magnetic field clockwise around the loop. D) current counter-clockwise around the loop.his has to do with Lenz's Law of Electromagnetic Induction. The direction of the magnetic field due to the bar magnet is downward (N to S). When the bar magnet enters the loop, the magnet induces a current (cross out A and C), in the wire. This current in turn produces its own magnetic field. However, there's no such thing as free. The current must create a magnetic field to oppose the one that made it (the bar magnet's). Therefore, the magnetic field must point upward. Now use the Second Right Hand Rule (fingers point in the direction of field while thumb points in the direction of the current). You will notice that this means (looking down on it) that the current will be directed counter-clockwise (Choice D).

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