Jeppensen Chapter 3 Section E

Question 1

1. The two-element vacuum tube is known as a ______

Answer 1

ANSWER: diode

Question 2

2. The _____ acts as an electron check valve.

Answer 2

ANSWER: diode

Question 3

3. If a semi-conductor diode is forward biased, electrons _____ flow through it

Answer 3

ANSWER: can

Question 4

4. The diode in _____ (A or B) is forward-biased.

Answer 4

ANSWER: b

Question 5

5. The diode in _____ (A or B) is forward-biased.

Answer 5

ANSWER: a

Question 6

6. When a specific voltage is placed across a _____ diode in its reverse bias direction, it will break down and conduct.

Answer 6

ANSWER: zencer

Question 7

7. This is the symbol for a ______ ______ .

Answer 7

ANSWER: zencer diode

Question 8

8. A zencer diode may be used as a ______ sensor in a solid-state voltage regulator.

Answer 8

ANSWER: voltage

Question 9

9. A three element solid state device may be used as a _____ valve in a circuit.

Answer 9

ANSWER: control

Question 10

10. Transistor _______ (A or B) in an NPN transistor.

Answer 10

ANSWER: b

Question 11

11. Identify the electrodes in this transistor:

Answer 11

1ANSWER: emitter
2ANSWER: collecter
3ANSWER: base

Question 12

12. Which transistor has its emitter-base junction properly biased to conduct?
    ______ (A or B)

Answer 12

ANSWER: a

Question 13

13. Identify the terminals of the silicon controlled rectifier symbol.

Answer 13

1ANSWER: anode
2ANSWER: cathode
3ANSWER: gate

Question 14

14. A pulse of ______ voltage is applied to the gate of a silicon controlled rectifier to cause it to conduct.

Answer 14

ANSWER: positive

Question 15

15. This is the symbol for a(n) ______

Answer 15

ANSWER: triac

Question 16

16. A field-effect transistor controls the load current flow by the control of the ______ on its gate.

Answer 16

ANSWER: voltage

Question 17

17. This is the symbol for a ______ _______ transistor.

Answer 17

ANSWER: field-effect

Question 18

18. This is the symbol for a ______ transistor

Answer 18

ANSWER: unijunction

Question 19

19. Using a magnetic amplifier, a small amount of _____ current may be used to control a large amount of ______ current.

Answer 19

ANSWER:
Direct
Alternating

Question 20

20. When the DC control voltage increases, the alternator field current will _____.

Answer 20

ANSWER: decrease

Question 21

21. This is the symbol for a(n) _______

Answer 21

ANSWER: photodiode

Question 22

22. This is the symbol for a(n) _______

Answer 22

ANSWER: light emitting diode

Question 23

23. A light-emitting diode will light up when it is ______ biased.

Answer 23

ANSWER: forward

Question 24

24. What type of circuit is used to convert alternating current into direct current?

Answer 24

ANSWER: rectifier

Question 25

25. In order to change both halves of the AC cycle into DC, we must use a ____ rectifier.

Answer 25

ANSWER: full-wave

Question 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 26

ANSWER: filter

Question 27

27. A small change in the ______ current produces a large change in the load current in a transistor amplifier.

Answer 27

ANSWER: base