Electric Current and Magnetism

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Presentation transcript:

Electric Current and Magnetism - What Is Electromagnetism? Electric Current and Magnetism An electric current produces a magnetic field.

Solenoids - What Is Electromagnetism? The magnetic field produced by a current has three distinct characteristics. The field can be turned on or off, have its direction reversed, or have its strength changed.

Solenoids - What Is Electromagnetism? The magnetic field around a solenoid resembles that of a bar magnet.

Electromagnets - What Is Electromagnetism? A doorbell rings as the magnetic field of an electromagnet turns on and off.

Electromagnets - What Is Electromagnetism? Electromagnets are used to lift heavy objects. A switch is turned on in the crane so that a current is produced in the electromagnet.

Electrical Energy and Motion Electricity, Magnetism, and Motion Electrical Energy and Motion When a wire with current is placed in a magnetic field, electrical energy is transformed into mechanical energy.

Generators - Electricity From Magnetism A generator uses motion in a magnetic field to produce an electric current.