Magnetic force on a stationary body A charged particle near a

Adelyn Rodriguez

Adelyn Rodriguez

Answered question

2022-05-08

Magnetic force on a stationary body
A charged particle near a current-carrying wire does not experience a magnetic force when its velocity is equal to 0. So why does a compass needle kept near a current carrying wire experience a force when the compass needle is at rest?

Answer & Explanation

jcholewa39v8f

jcholewa39v8f

Beginner2022-05-09Added 13 answers

A compass needle is magnetized and will experience a force or torque when placed in an external magnetic field such as one produced by a nearby current carrying wire. The compass needle is said to have a "magnetic moment" which measures how magnetized it is, and therefore how strongly it responds to external magnetic fields. Sometimes, magnetic materials like the compass needle are modeled by loops of current, similar to a solenoid. Since the current is moving charges, v 0, they will experience the forces which produces the movement of the compass needle.
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