What is being produced by the coil of wire?

Electromagnetic induction is the process of generating electric current with a magnetic field. It occurs whenever a magnetic field and an electric conductor, such as a coil of wire, move relative to one another.

What is a coil of wire that produces a magnetic field?

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. Electromagnets usually consist of wire wound into a coil. A current through the wire creates a magnetic field which is concentrated in the hole, denoting the center of the coil.

When a magnet is moved into a closed coil of wire a current is induced in it because?

Figure 20.34 The bar magnet moves downward with respect to the wire loop, so that the number of magnetic field lines going through the loop decreases with time. This causes an emf to be induced in the loop, creating an electric current.

How is a magnetic field produced in a field coil?

An electromagnetic coil is an electrical conductor such as a wire in the shape of a coil, spiral or helix. The magnetic fields generated by the separate turns of wire all pass through the center of the coil and add (superpose) to produce a strong field there. The more turns of wire, the stronger the field produced.

What is a pickup coil physics?

A coil of wire doesn’t respond to a magnet field but rather to a change in magnetic flux through its ends. Such a coil is commonly called a pickup coil or a search coil.

What should happen to the current in a coil of wire when the north pole of a bar magnet is moved toward it?

When we induce a current in the coil, it becomes an electromagnet. One end of the coil is a north pole and the other end is a south pole. When the north pole of our magnet is moving towards the left hand end of the coil, the induced current flows anticlockwise (as we look at the left hand end).

When does a coil experience an induced current when magnetic field varies?

A coil experiences an induced current when the magnetic field passing through it varies. (a) When the magnet moves toward the coil the current is in one direction. (b) No current is induced while the magnet is held still.

What causes a solenoid to generate a magnetic field?

When a current passes through it, it creates a nearly uniform magnetic field inside. Solenoids can convert electric current to mechanical action, and so are very commonly used as switches. The magnetic field within a solenoid depends upon the current and density of turns.

What happens when a magnet is pulled away from a loop?

Figure 23–8 Applying Lenz’s law to a magnet moving away from a current loop (b) If the north pole of a magnet is pulled away from a conducting loop, the induced current produces a south magnetic pole near the magnet’s north pole. The result is an attractive force opposing the motion of the magnet.

What happens when the North Pole of a magnet is moved?

(a) If the north pole of a magnet is moved toward a conducting loop, the induced current produces a north pole pointing toward the magnet’s north pole. This creates a repulsive force opposing the change that caused the current. S NMagnetic flux through coil increases.