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Similar to NPN but with opposite semiconductor type, allowing current to flow when low base current is applied.

A reference point in an electrical circuit from which voltages are measured, a common return path for current, or a direct physical connection to the Earth.

A device used to store an electric charge, consisting of one or more pairs of conductors separated by an insulator.

A three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider.

High-gain voltage amplifier with a differential input and usually a single-ended output.

A coil of wire that creates a magnetic field when current flows through it and opposes changes in the current.

A two-terminal device that maintains a fixed voltage across its terminals.

A type of capacitor with a larger capacitance per unit volume than other types, which uses an electrolyte as one of its plates to achieve a larger capacitance.

A resistor whose resistance can be adjusted manually.

A safety device that stops the flow of current when the current exceeds a certain level.

A device that transfers electrical energy between two or more circuits through electromagnetic induction.

A type of resistor whose resistance is dependent on temperature, more so than in standard resistors.

A two-terminal electronic device that delivers or absorbs an electric current which is independent of the voltage across it.

A semiconductor device used to amplify or switch electronic signals and electrical power.

Single Pole Single Throw switch, controls the connection of a circuit to one path.

A device that opposes the flow of electrical current.

A device that allows current to flow in only one direction.

Light Emitting Diode, a semiconductor device that emits light when current flows through it.

A set of electronic circuits on one small flat piece (or 'chip') of semiconductor material.