A light bar magnet is suspended near a current-carrying wire as shown in the figure. How does the bar magnet respond to the current-carrying wire?
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The magnet produces a fixed field due to the fixed orientation of the atoms creating it. The current in the wire is not fixed in the same way, so it can rotate around inside the wire, allowing it to always follow the fixed field. Opposite fields attract, which always...
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The bar magnet moves towards the anticlockwise direction of the current-carrying wire.
- It is because the magnetic field created by the electric current in the wire is changing directions around the wire.
- Moreover, it will repel both poles of the magnet by bending away from the wire.
- However, as the north pole is moved towards the coil, the magnetic field increases in the direction of motion.
- Thus, by Fleming's right-hand rule current will be in an anti-clockwise direction, when viewed in the direction of the motion of the magnet.
- Lastly, when the current flows through the solenoid in the anticlockwise direction, the magnetic lines of force inside of the coil will be along the axis outwards.
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