The Geomagnetic Field
The earth has a core made up largely of iron, heated to the extent that […]
Magnetism
Causes and Effects
Magnets are attracted to some, but not all, metals. Iron, nickel, and alloys containing either […]
Magnetic Field Strength
The overall magnitude of a magnetic field is measured in units called webers (Wb). A […]
Electromagnets
In an electromagnet, the magnetic flux is concentrated in a ferromagnetic rod surrounded by a […]
Magnetic Properties of Materials
There are four important properties that materials can have with respect to magnetic flux. These […]
Permanent Magnets
Permanent magnets are manufactured by using a high-retentivity ferromagnetic material as the core of an […]
A Ringer Device
A solenoid-coil bell ringer. Above figure is a simplified diagram of a bell ringer, also […]
The Relay
At A, pictorial diagram of a simple relay. At B, the schematic symbol for the […]
The DC Motor
A functional diagram of a dc motor Magnetic forces can be harnessed to do work. […]
Magnetic Tape
On recording tape, particles are magnetized in a pattern that follows the input waveform. Graph […]
Magnetic Disk
Since the advent of the personal computer, ever-more compact data-storage systems have evolved. One of […]
Bubble Memory
Bubble memory is a sophisticated method of storing data that gets rid of the need […]