the alternating current through the wire passing in the magnetic field will feel

The alternating current passing through a wire in a magnetic field will experience a force. This is due to the interaction between the magnetic field and the moving electric charges (current) in the wire.

Here are the steps to understand this:

1. According to the Lorentz force law, a moving charge in a magnetic field experiences a force. The force is perpendicular to both the direction of the velocity of the charge and the direction of the magnetic field.

2. In an alternating current, the direction of the current changes periodically. This means the direction of the moving charges in the wire also changes periodically.

3. When the current is in one direction, the force due to the magnetic field will be in one direction. When the current changes direction, the force will also change direction.

4. Therefore, the wire carrying an alternating current in a magnetic field will experience a force that changes direction periodically. This can cause the wire to move or vibrate if the force is strong enough.

5. This principle is used in many devices, such as loudspeakers and electric motors. In a loudspeaker, for example, the alternating current in the voice coil produces a varying force in the magnetic field of the magnet, causing the coil (and thus the speaker cone) to vibrate and produce sound.