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Introduction to Solid State Devices and Power Supplies


Quiz Questions

1.The term negative temperature coefficient is just another way of saying its resistance to electrical current flow decreases as temperature increases.
True
False
2. Selenium has a property to convert dc into ac.
True
False
3.Maximum _____________is the maximum current permitted to flow in the forward direction in the form of nonrecurring pulses.
Surge current
Forward current
4.__________ bonding is the sharing of valence electrons between two or more atoms.
Covalent
Ionic
5.Current flow in an N-type material is similar to conduction in a copper wire.
True
False
6.A _______________ is a chemical combination of two or more elements.
Molecule
Atom
Compound
None of the above
7._____________is an external voltage that is applied to a PN junction to reduce its barrier and, therefore, aid current flow through the junction.
Reverse bias
Forward bias
8.Diode ratings are not the limiting value of operating conditions of a diode.
True
False
9.A ________is a three or more element solid-state device that amplifies by controlling the flow of current carriers through its semiconductor materials.
Diode
Rectifier
Transistor
None of the above
10.The proper biasing of a transistor enables the transistor to be used as an amplifier.
True
False
11.The_______________________ is mainly used for impedance matching, since it has a low input resistance and a high output resistance..
Common emitter configuration
Common ground configuration
Common base configuration
None of the above
12.The current gains for the three transistor configurations (CB, CE, and CC) are alpha, beta and gamma.
True
False
13.The______________ is a three-terminal, solid-state device with only one PN junction.
Uni-junction transistor
Mosfet
14.The SILICON CONTROLLED RECTIFIER (SCR) is a four-element, solid-state device that does not combine characteristics of both diodes and transistors.
True
False
15.The _________diode is a heavily doped PN junction that exhibits negative resistance over part of its range of operation.
Zener
Tunnel
16.HALF-WAVE rectifiers give an output on only one half cycle of the input ac.
True
False
17.Bridge rectifiers are full-wave rectifiers that do not use a center-tapped, high-voltage secondary.
True
False
18.Inductor filters does not use an inductor called a choke to filter the pulsating dc input. Because of the impedance offered to circuit current, the output of the filter is at lower amplitude than the input.
True
False
19.______________________ uses a variable resistance placed in parallel with the load.
Series regulator
Shunt regulator
20.A positive electrode of an electrochemical device (such as a primary or secondary electric cell) toward which the negative ions are drawn is a _____________________.
Cathode
Anode