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What is the cause of a magnetic field about a current-carrying wire?
A magnetic field is created around a current-carrying wire due to the flow of electric charge. The moving electrons in the wire generate a magnetic field perpendicular to the direction of the current flow, following the right-hand rule. This phenomenon is described by Ampère's law.
What is the effect of the magnetic field of a short wire on nearby objects?
The magnetic field of a short wire can attract or repel nearby objects that are sensitive to magnetic forces. This effect is stronger the closer the objects are to the wire and can cause them to move or align in a certain direction.
How does the wire vibrate if the magnetic field is made vertical?
If the magnetic field is made vertical, it will exert a force perpendicular to the direction of current flow in the wire. This force will cause the wire to move up and down, vibrating vertically. The frequency of this vibration will be directly proportional to the strength of the magnetic field and the current flowing through the wire.
Does a wire with no current have a magnetic field?
Yes, a wire with no current flowing through it does not produce a magnetic field. Current flow is required to generate a magnetic field around a wire.
Why does a current carrying wire deflect a magnetic compass?
A current-carrying wire generates a magnetic field around it due to the flow of electric charges. When the wire is placed near a magnetic compass, the magnetic field produced by the wire interacts with the magnetic field of the compass needle, causing the needle to deflect and align with the direction of the wire's magnetic field.
