A few weeks ago, I had some help on some questions on a electronics
quiz. Anyways, thanks Stephan.
I got the quiz back and thought I would post the entire quiz for all
to answer if they wanted. There is no need to post your answers,
this is just for your all information and enjoyment.
I will post the answers to each tomorrow. Hopefully some will enjoy
and learn from it.
1. Which test instrument is designed to measure current, voltage,
and resistance?
a) A DC Power supply b) A multimeter
c) Function generator d) An Oscilliscope
2) Which test instrument is used to generate waveforms of a certain
shape and frequency?
a) DC power supply b) A multimeter
c) Function generator d) An Oscilliscope
3) Which instrument is designed to to deliver a DC voltage for
expermentation?
a) DC power supply b) A Multimeter
c) Function generator c) An Oscilliscope
4) Which test instrument is used primarily to display the shape and
spacing of electrical signals?
a) DC power supply b) A Multimeter
c) Function generator d) An Oscilliscope
5) The Oscilliscope can be used to measure:
a) AC and DC voltage b) Frequency c) Rise and fall times
d) Duration e) All of the above
6) How many electrons are present in the valence shell of a
semiconductor?
a) 2 b) 4 c) 6 d) 8
7) A hole is consdiered to be a:
a) Negative charge carrier b) Positive charge carrier
8) What are the majority carriers in an N-type material?
a) Holes b) Electrons
9) What are the majority carriers in P-type material?
a) Holes b) Electrons
10) What is the approximate barrier potential for a silicon diode?
a) 0.3V b) 0.4V c) 0.7V d) 2.0V
11) The junction diode can be found in a __________ circuit that is
used to convert AC to DC.
a) Rectifier b) Modulator c) Demodulator d) Digital Logic
12) The four main blocks of a power supply, in order are:
a) Rectifier, Transformer, Filter, Regulator
b) Transformer, Filter, Rectifier, Regulator
c) Transformer, Rectifier, Filter, Regulator
d) Transformer, Filter, Regulator, Rectifier
13) A _______ diode can be used as a voltage regulator.
a) LED b) Photodiode c) Zener d) Schottky
14) The reverse ______ a zener remains constant while the reverse
zener _______ varies.
a) Current of; voltage b) Voltage across; current
15) What resistance should a good rectifier diode have when it is
forward biased?
a) High b) Low C) Infinite d) Any of the above
16) What resistance should a good rectifier diode have when it is
reversed biased?
a) High b) Low c) Zero d) Any of the above
17) When a diode is on under normal operating bias conditions, you
can assume it be ______ to the DC and _______ to the AC.
a) a(n) essentially constant voltage; a(n) low value resistance
b) a(n) low value resistance; a(n) essentially constant voltage
18) A ______ diode would typically be used in a power supply as a
power indicator.
a) Rectifier b) Light emitting c) Zener d) Junction
19) A ________ diode would be typically used as a regulator.
a) Rectifier b) Light emitting c) Zener d) Junction
20) To forward bias a PN junction, place a relative _______
potential to the N material and a relative ________potential to the
P material.
a) Negative; positive b) Positive; Negative
21) To reverse bias a PN junction, place a relative ______ potential
to the N material and a relative _______ potential to the P material.
a) Positive; Negative b) Negative; Positive
22) Silicon has a valence of _______.
23) In a filtered bridge power supply, the DC output voltage is
approximately normal but the ripple is approximately twice as large
as normal. What is the most probable cause?
a) Open Capacitor b) Shorted diode c) Open diode d) Open Load
24) In a filtered full-wave center tapped power supply, the expected
DC output voltage is 24 volts. The measured output voltage is 15.3
volts, what is the most probable cause?
a) Open capacitor b) Shorted diode c) Open diode d) Open Load
25) When a filtered capacitor is properly inserted in a rectifier
power supply, the average DC out will ______, the AC ripple out will
_______.
a) decrease; increase b) increase; increase
c) increase; decrease d) decrease; increase
That's it. Will post answers tomorrow sometime.
