A bar magnet with magnetic dipole moment 0.54A*m^2 lies on the negative x axis. A compass is located at the origin. Magnetic north is in the negative z direction. Between the bar magnet and the compass is a coil of wire of radius 3.5 cm, connected to batteries not shown. The distance from the center of the coil to the center of the compass is 9.7 cm. The distance from the center of the bar magnet to the center of the compass is 22.5 cm. A steady current of 0.96 A runs through the coil. Conventional current runs clockwise in the coil when viewed from the location of the compass. Despite the presence of the coil and the bar magnet, the compass points north. (a) Which end of the bar magnet is closer to the compass

Mehlqv

Mehlqv

Open question

2022-08-17

A bar magnet with magnetic dipole moment 0.54 A m 2 lies on the negative x axis. A compass is located at the origin. Magnetic north is in the negative z direction. Between the bar magnet and the compass is a coil of wire of radius 3.5 cm, connected to batteries not shown. The distance from the center of the coil to the center of the compass is 9.7 cm. The distance from the center of the bar magnet to the center of the compass is 22.5 cm. A steady current of 0.96 A runs through the coil. Conventional current runs clockwise in the coil when viewed from the location of the compass. Despite the presence of the coil and the bar magnet, the compass points north. (a) Which end of the bar magnet is closer to the compass

Answer & Explanation

Ashlynn Stephens

Ashlynn Stephens

Beginner2022-08-18Added 25 answers

The compass is still pointing north, this means that the magnetic field applied on the compass is zero. This will occur when the coil and the magnet have the same magnitude of the magnetic field but in the opposite direction for each other.
This will help us to determine which end of the magnet is closer to the compass. So, let us determine the direction of the magnetic field in the coil.
To determine the direction of the magnetic field we apply the right-hand rule, where your thumb is in the direction of the conventional Current and your finger curl into the page (look from the compass side). Hence, as the direction of the current is clockwise, the direction of the magnetic field will be the negative direction of x-axis.
We mentioned that the magnetic field of the magnet has an opposite direction of the coil, therefore, the direction of the magnetic field of the magnet is to the positive direction ofx-axis.
In the magnet, the lines of the magnetic field move from the north to the south, so to make the direction of the magnetic lines toward the compass, the south pole must be the closest end to the compass.

Do you have a similar question?

Recalculate according to your conditions!

New Questions in Electromagnetism

Ask your question.
Get an expert answer.

Let our experts help you. Answer in as fast as 15 minutes.

Didn't find what you were looking for?