Transistor

Question 1

What are the two basic types of transistors?

Answer 1

NPN and PNP

Question 1

What is a transistor?

Answer 1

Transistor are made by connecting three piece of semiconductor material together.

Question 2

What is the difference between NPN and PNP?

Answer 2

NPN transistor must have a positive voltage connected to the collector and a negative voltage connected to the emitter

PNP transistor must have a positive voltage connected to the emitter and negative voltage connect to the collector

Question 3

The term that is made up of three layers of semiconductor material

Answer 3

Bipolar-Junction Transistor (BJT)

Question 4

the term transistor comes from the words “_____” and “_____”

Answer 4

“transfer” and “Resistor”

Question 5

If two block of N-type semiconductor material are separated with a very thin layer of P-type semiconductor material, then an __________ is created.

Answer 5

NPN transistor

Question 6

Transistor have three leads. Name the three leads

Answer 6

Base (centre)
Collector (without arrow)
Emitter (with arrow)

Question 7

If two block of P-type semiconductor material are separated with a very thin layer of N-type semiconductor material, then an __________ is created.

Answer 7

PNP transistor

Question 8

the emitter arrow of the transistor always points from _______ to ______

Answer 8

P-type to N-type

Question 9

the only basic difference between using NPN and PNP style of transistors is in the…….

Answer 9

Polarity of connection

Question 10

what is a simple definition of an “amplifier”?

Answer 10

Amplifier is a device that controls a large current with a very small current.

Question 11

what advantages does transistor have than relay?

Answer 11

1. it has no contacts to pit
2. No coil to burn out
3. no moving parts to wear down

Question 12

When base current is reduced to a value close to zero or large value of Rb, then no collector current is allowed to flow. This is known as

Answer 12

Cut-off

Question 13

What does it mean, when the transistor amplifier circuit, have a voltage source is lower than VRc?

Answer 13

the circuit is Saturated

Question 14

the beta of a transistor can be anywhere in the range of ________

Answer 14

10 to 500

Question 15

The emitter-base junction of a transistor is _______ biased, the collector-base junction is ______ biased.

Answer 15

Forward, Reverse

Question 16

The arrow on the emitter of a transistor indicated points from _______ to ______.

Answer 16

P-type to N-type

Question 17

The two of the major applications of transistors are for the purpose of ______ and ______.

Answer 17

switching and amplifying

Question 18

The NPN transistor mush have a _______ voltage connected to _______ and a _______ voltage connected to the emitter.

Answer 18

postive, collector
negative,

Question 19

The PNP transistor mush have a _______ voltage connected to _______ and a _______ voltage connected to the ________.

Answer 19

positve, emitter
negative, collector

Question 20

the base must be connected to to same polarity as the collector to forward bias the transistor. True or false

Answer 20

True

Question 21

How can you identify the type of transistor?

Answer 21

Using ohm meter.

Question 22

If the postive lead of the ohmmeter is connected to the base of the transistor, _____________________.

Answer 22

a diode junction should be seen between the base-collector and the base-emitter.