Chapter 19 Flashcards
What is a semiconductor?
A semiconductor is a substance whose resistivity is between that of a good conductor and a good insulator
What is intrinsic conduction?
Intrinsic conduction is the movement of charge through a pure semiconductor
What is extrinsic conduction?
Extrinsic conduction is the movement of charge through a doped semiconductor
What is doping?
Doping is the addition of a small amount of another element to a pure semiconductor to increase its conductivity
What is an n-type semiconductor?
An n-type semiconductor is one in which the impurity added produces more free electrons available for conduction
What is a p-type semiconductor?
A p-type semiconductor is one in which the impurity added produces extra holes which are available for conduction
What is a diode?
A diode is a semiconductor device that allows current to flow in one direction only?
What is a p-n junction?
A p-n junction is where there is a p-type conductor touching an n-type
What is an LDR?
A light dependent resistor is a semiconductor device whose resistance varies from a high value in the dark to a lower value in bright light
What is a thermistor?
A thermistor is a semiconductor device whose resistance decreases rapidly with increasing temperature
