Most of the electrons in the base of a bipolar junction transistor flow a.into the collector. out of the base lead. into the base battery. into the...

1.Most of the electrons in the base of a bipolar junction transistor flow

a.into the collector.

b. out of the base lead.

c. into the base battery.

d. into the emitter.

2.The wide end arrow on the electronic symbol of a diode indicates the ____________ of a diode.

a.ground

b. anode

c.cathode

d. direction of electron flow.

3. What are the symbols used to represent digits in the binary number system?

a. 0,1,2

b.1,2

c. 0 through 9

d. 0,1.

4.Give the decimal value of binary 10010.

a. 9

b.6

c. 20

d.18

5. Give the decimal value of binary 10000110.

a. 126

b. 110

c. 134

d. 144

6. What is the decimal value of 23?

a. 6

b. 8

c. 2

d. 4

7.How many unique symbols are used in the decimal number system?

a. 10

b. 9

c.2

d. Unlimited

8. Binary systems in electronic technology have ________.

a. 10 states

b. four states

c. two states

d. one state

9. Digital systems require that voltage levels change between high and low.

a. False

b. Does not matter.

c. True

10.In electronic technology, a digital voltage has a discrete set of values.

a. True

b. False

c. Often

d. Sometimes

11.Digital representations of numerical values of quantities may BEST be described as having characteristics:

a. that vary continuously between two possible values.

b. that vary constantly over a continuous range of values.

c. that are difficult to interpret because they are continuously changing.

d. that vary in discrete steps in proportion to the values they represent.

12.In a transistor, collector current is controlled by:

a. reverse bias of the emitter-base pn junction.

b. base current.

c. collector resistance.

d. emitter current.

13. If the input signal voltage increases in the circuit at the right, the collector current

___________ and the collector voltage  __________.

a.  decreases, increases

b. increases, increases

c. decreases, decreases

d. increases, decreases

14.Silicon is a common element found in _______ and is _______ percent of the Earth's crust. 

a. atmosphere, 60%

b. sand, 28%

c. ocean, 52%

d. concrete, 75%

15.What is the "small, solid, piece of single crystal" that is lowered into molten silicon called? 

a. junction

b. dopant

c. seed

d. starter

16. A _____________ is a photographic image of one of the layers of the circuit. 

a. circuit

b. photomask

c. format

d. detailer

17. Hydrochloric acid, sulfuric acid, hydrogen peroxide, and ammonium hydroxide are used to clean the silicon ___________ in order to remove organic and metal contaminants.

a. sand

b. wafers

c. ions

d. domants

18. Increasing the amount of dopants increases the the number of free electrons or holes. 

a.True

b. Dopants only provide free electrons.

c. False

19. The type of transistor described in the video is the ______________?

a. JFET

b. npn

c. BJT

d.MOSFET

20. the metal used to make interconnections between transistors is _____________.

a. copper

b.platinum

c.silver

d. gold