1
Q
- The two-element vacuum tube is known as a ______
A
ANSWER: diode
2
Q
- The _____ acts as an electron check valve.
A
ANSWER: diode
3
Q
- If a semi-conductor diode is forward biased, electrons _____ flow through it
A
ANSWER: can
4
Q
- The diode in _____ (A or B) is forward-biased.
A
ANSWER: b
5
Q
- The diode in _____ (A or B) is forward-biased.
A
ANSWER: a
6
Q
- When a specific voltage is placed across a _____ diode in its reverse bias direction, it will break down and conduct.
A
ANSWER: zencer
7
Q
- This is the symbol for a ______ ______ .
A
ANSWER: zencer diode
8
Q
- A zencer diode may be used as a ______ sensor in a solid-state voltage regulator.
A
ANSWER: voltage
9
Q
- A three element solid state device may be used as a _____ valve in a circuit.
A
ANSWER: control
10
Q
- Transistor _______ (A or B) in an NPN transistor.
A
ANSWER: b
11
Q
- Identify the electrodes in this transistor:
A
1ANSWER: emitter
2ANSWER: collecter
3ANSWER: base
12
Q
- Which transistor has its emitter-base junction properly biased to conduct?
______ (A or B)
A
ANSWER: a
13
Q
- Identify the terminals of the silicon controlled rectifier symbol.
A
1ANSWER: anode
2ANSWER: cathode
3ANSWER: gate
14
Q
- A pulse of ______ voltage is applied to the gate of a silicon controlled rectifier to cause it to conduct.
A
ANSWER: positive
15
Q
- This is the symbol for a(n) ______
A
ANSWER: triac
16
Q
- A field-effect transistor controls the load current flow by the control of the ______ on its gate.
A
ANSWER: voltage
17
Q
- This is the symbol for a ______ _______ transistor.
A
ANSWER: field-effect
18
Q
- This is the symbol for a ______ transistor
A
ANSWER: unijunction
19
Q
- Using a magnetic amplifier, a small amount of _____ current may be used to control a large amount of ______ current.
A
ANSWER:
Direct
Alternating
20
Q
- When the DC control voltage increases, the alternator field current will _____.
A
ANSWER: decrease
21
Q
- This is the symbol for a(n) _______
A
ANSWER: photodiode
22
Q
- This is the symbol for a(n) _______
A
ANSWER: light emitting diode
23
Q
- A light-emitting diode will light up when it is ______ biased.
A
ANSWER: forward
24
Q
- What type of circuit is used to convert alternating current into direct current?
A
ANSWER: rectifier
25
25. In order to change both halves of the AC cycle into DC, we must use a ____ rectifier.
ANSWER: full-wave
26
26. When converting single-phase AC to DC using a rectifier, a(n) ______ may be used to smooth out the DC so that it will remain at a fairly constant value.
ANSWER: filter
27
27. A small change in the ______ current produces a large change in the load current in a transistor amplifier.
ANSWER: base
