Why is there no force when current is parallel to magnetic field?

If the B field and the velocity of the charge are in the same direction, then there is no way to distinguish any single direction of the resulting force (there’s a 360 degree spread of perpendicular directions). So, the only force vector that has no direction must be the correct answer (i.e. zero force).

Does a current carrying wire in magnetic field always experience a magnetic force?

Moving charges experience a force in a magnetic field. If these moving charges are in a wire—that is, if the wire is carrying a current—the wire should also experience a force.

Why does a current carrying wire experience a magnetic force when the wire is placed perpendicular to the magnetic field?

The magnetic field is the Lorentz transform of the electric field. If we boost to the reference frame of the moving charges in your current, an electric field will emerge. The resulting electric force is perpendicular to both the magnetic field and the velocity of the charges in the current.

Why does a magnet apply a force to a current carrying wire?

Because charges ordinarily cannot escape a conductor, the magnetic force on charges moving in a conductor is transmitted to the conductor itself. The magnetic field exerts a force on a current-carrying wire in a direction given by the right hand rule 1 (the same direction as that on the individual moving charges).

Why does a wire experience a force in a magnetic field?

A wire carrying a current creates a magnetic field . This can interact with another magnetic field, causing a force that pushes the wire at right angles. This is called the motor effect .

Why do parallel wires attract?

The force between two parallel wires Parallel wires carrying currents will exert forces on each other. One wire sets up a magnetic field that influences the other wire, and vice versa. When the current goes the same way in the two wires, the force is attractive.

Why do current carrying parallel conductor attract or repel each other?

Two parallel wires carrying currents in the same direction attract each other due to magnetic interaction between two wires carrying currents because the current in a wire produces a magnetic field and the magnetic interaction is of attractive nature when current in the two parallel wires is in the same direction.

Why does a current carrying wire have a magnetic field?

When a current flows in a wire, it creates a circular magnetic field around the wire. This magnetic field can deflect the needle of a magnetic compass. The strength of the magnetic field is greater closer to the wire, and increases if the current increases.

Why does a current carrying wire move when placed in a magnetic field?

When a current-carrying conductor is placed in a magnetic field the wire experiences a force due to the interaction between the field and the magnetic field produced by the moving charges in the wire. That is why the conductor experiences a force.

Why does a current carrying wire experience a force?

If the current-carrying wire is placed in a magnetic field (whose lines of force are at right angles to the wire) then it will experience a force at right angles to both the current direction and the magnetic field lines. The force increases if the strength of the magnetic field and/or current increases.