Varable resistor with two terminals to vary current (I).
Thermally sensitive resistor whoes resistance has an non linear value change with changes in operating temperture.
Variable resistor with three terminals connected as a volt divider.
Positive charge that exists only in doped semiconductors because of convalent bonds between atoms. The amount of hole charge is the same as that of a proton and electron.
Atom or group of atomes with net charge. Can be produced in liquids, gases, and doped semiconductors
Property of electric charge and voltage.
Motion of hole charges. Direction is the same as that of conventional current.
Is an excess of electrons
Deficiency of electrons
Negative temperature coefficient (NTC)
Thermister resistance decreases as its operating temperture increases
Positive temperature coefficient (PTC)
Thermister resistance increases as the operating temperature increases.
The amount of current in a circuit is directly proportional to the amount of voltage applied and inversly proportional to the amount of resistance.
How much resistance is measured in a short circuit
How much resistance is measured in an open circuit.
Kirchhoff's Voltage Law
In a series circuit the sum of all the resistor voltage drops equal the applied voltage.
The ability to do work in moving another charge. Measured in Volts
Kirchhoff's current law
In an parallel circuit the total current in the main line equals the sum of the individual branch currents.
Has practically zero resistance
Has infinite resistance
A resistor whose resistance varies in proportion to the voltage of the current through it.
A circuit that is used to determin the value of an unknown resistance
A precision resistance variable 0-9999 in 1 ohm steps.
Two resistors with precision resistances use to determin the value for an unknown resistance.
Measured voltage decreases because of an additional load current through the meter
A precision resistor connected across the meter movement for the purpose of bypassing a specific fraction of circuit's current around the meter movement.
Specifies the sensitivity of a meter in all voltage ranges. The higher the number the better.
A junction, connection or terminal within a circuit were two or more circuit elements are connected or joined together giving a connection point between two or more branches.
Is a single or group of components such as resistors or a source which are connected between two nodes
Is a simple closed path in a circuit in which no circuit element or node is encountered more than once.
Is a single open loop that does not have a closed path. No components are inside a mesh.
The ability to concentrate magnetic flux
The ratio of permeability of a medium to that of free space
Magnetic lines of force
Amount of flux per unit area
A coil of wire designed to produce a magnetic field when energized.
The direction of induced current must be such that its own magnetic field will oppose the action that produced the induced current.
Faraday's law of induced voltage
Current produced by magnetic forces without physical contact.
Any force or system of forces that causes or tends to cause rotation
The characteristic that opposes any change in current.