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bulk resistance - The natural resistance of a "P" type or "N" type semiconductor material.
equivalent resistance - Total resistance of all the individual resistances in a circuit.
Four arm bridge circuit used to measure resistance, inductance or capacitance. -
insulation resistance - Resistance of insulating material. The greater the insulation resistance, the better the insulation.
internal resistance - Every source has some resistance in series with the output current. When current is drawn from the source some power is lost due to the voltage drop across the internal resistance. Usually called output impedance or output resistance.

Types
Resistor Types Metal Film - Work from a thin film of metal or particles of metal are used to achieve different resistances. Carbon Film - A thin film of carbon is laid upon a rod of cer


Resistors
Resistors Resistors limit or reduce the current passed across them. They do this by by having different densities of different materials within them, the most common of which is carbon. Make

Diodes
Diodes Diodes are one of the most common semiconductor devices. As we know from the last page, both N and P type silicon conduct electricity. The conductivity (or resistance) of both is by how doped

Audio
Audio Components Audio components convert sound waves into currents and currents into sounds. Devices that convert sound waves to electrical current are normally know as microphones and devices that

Drawing Circuits
Drawing Circuits When designing circuits it is not practical to draw physical likenesses of the components you wish to use. In place of each component a symbol is use to represent it. For example: