IG Phy -Electromagnetic Induction(II)

A wire carrying an electric current produces a magnetic field around itself.

The strength of the magnetic field generated by a current-carrying wire depends on the magnitude of the current.

Reversing the current direction in a wire does not change the direction of the magnetic field.

The magnetic field lines around a current-carrying wire form straight lines.

The dot in the center of a wire indicates that the current is directed away from you.

Iron filings can be used to reveal the magnetic field pattern around a wire.

A solenoid consists of a wire coiled into a spiral shape.

The magnetic field inside a solenoid is similar to that of a permanent magnet.

The strength of the magnetic field in a solenoid does not depend on the current.

The direction of the magnetic field around a solenoid can be determined using a small compass.

Electromagnets are made by wrapping a coil of wire around an iron core.

The magnetic field of an electromagnet cannot be turned off.

A relay uses an electromagnet to operate a switch.

A loudspeaker produces sound by varying magnetic fields produced by varying currents.

The magnetic field of a coil in a loudspeaker interacts with a permanent magnet to produce sound.