ELEX Solid State Devices (book)

• What are small packets of light or heat energy called? Photon
• A semiconductor element that is mainly used in the production of resistors. Carbon
• The colored band near one end of an actual diode is used to indicate the Cathode
• Valence electron of Gallium Three
• Valence electrons of Arsenic Five
• It is the potential required to remove a valence electron from the atomic structure. Ionization potential
• What groups do most semiconductors belong? IIIA, IVA and V
• At room temperature, there are approximately ____ free carriers in a1 cm cube of intrinsic silicon. 1.5x10^10
• The free electrons in a material due only to external causes are referred to as Intrinsic carriers
• It is the ability of the free carriers to move throughout the material. Relative mobility
• The addition of donor impurities to ap-type semiconductor of acceptor impurities to an n-type semiconductor. Doping compensation
• Selenium has the property of being light sensitive, how its resistance affected by light? It decreases with an increase in light intensity
• It is a method of crystal growth used to obtain single of semiconductors. Czochralski process
• Semiconductor’s conductivity ____with heat. Increases
• What process takes place within the semiconductor to cause hole flow? The breaking of covalent bonds
• For high temperature and high-power requirement of semiconductors, the material used is SiC
• Which of the following does not result from adding an acceptor impurity? The substance has an electron surplus
• What determines whether a solid material will act as a conductor, a semiconductor, and an insulator? The energy difference across the forbidden gap
• The emission of electrons from hot bodies. Edison effect
• Radiation that results from recombination of charged carriers injected in a PN or PIN junction which is biased in forward direction. Lossev effect
• At room temperature, an intrinsic SI material will have about one free electron for every ____ atoms. 10^12
• What frequency radiation is produced by a forward-biased Ge or SI diode? Heat
• Most semiconductors have ____temperature coefficient. Negative
• Silicon is _______ sensitive to temperature change. Less
• Germanium has a breakdown voltage of less than 100 V to a maximum of_________. 400V
• Heating a semiconductor has what effect on its conductance? Increase
• The part number for a diode will always begin with the prefix 1N
• In the diode prefix 1N, the number 1 indicates 1 pn junction
• In the diode prefix 1N, the N indicates The device is a semiconductor diode
• The higher the current through the diode, the _______ is the dc resistance level. Lower
• The lower the Q-point, the ____ is the ac resistance. Higher
• Early semiconductor diodes are made mostly of minerals like Galena
• Schottky has ____ barrier potential. 0.2V
• Avalanche diodes has breakdowns of about _____. 6.2V
• Tunnel diode exhibits negative resistance which is caused by Quantum tunneling
• Trying to change the current through an inductive element too quickly may result in ____ that could damage surrounding elements. An inductive kick
• One of the cheapest but most effective way to protect the switching system is to place a capacitor called a _______across the coil. Snubber
• How does forward biasing affect junction resistance? Decrease
• When the PN junction diode is reverse biased, what happens to the majority carriers? They move away from the junction
• As you increase the reverse bias voltage on a PN junction, the reverse current increases. Breakdown voltage