Solid State

Question 1

What happens when arsenic is added to pure silicon?

Answer 1

Silicon becomes N Type material

Question 2

Two most common Semi Conductors?

Answer 2

Silicon and Germanium

Question 3

How many valence electrons does a pure semiconductor material have?

Answer 3

4

Question 4

Current carrier in P-Type

Answer 4

Holes

Question 5

Doping with arsenic, phosphorous or antimony results in

Answer 5

N-Type Material

Question 6

What happens to Pure Silicon at Room Temperature

Answer 6

will have some electrons freed to the conduction band from the heat

Question 7

What does it mean if a semiconductor material is extrinsic?

Answer 7

An impurity has been added to the pure material

Question 8

What occurs when gallium is added to pure silicon?

Answer 8

P-type Material is formed

Question 9

Current flow in intrinsic silicon

Answer 9

is much less than extrinsic silicon

Question 10

What happens when pure Silicon is doped with Indiu

Answer 10

P-type material if formed

Question 11

When diffusion occurs in a semi-conductor material the __________________ is formed in the area between the P and N material

Answer 11

Depletion Region

Question 12

When we use the term “bias” what are we referring to

Answer 12

Voltage applied to control operation of a device

Question 13

Thermal runaway in a diod?

Answer 13

Destroys Diode

Question 14

Varactor Diode?

Answer 14

Tuning in a Resonant Circuit

Question 15

Zener Diode?

Answer 15

Stabilize or Regulate Voltage

Question 16

When a diode is first formed, an interaction occurs where the electrons move from the “N” type material across the junction to fill holes in the “P” material. What is this process called?

Answer 16

Diffusion

Question 17

Light Emitting Diode?

Answer 17

emit light when electrical energy is applied to it

Question 18

A diode conducts current freely in one direction and opposes current in the opposite direction

Answer 18

True or False?

Question 19

What does a half wave rectifier do that a full wave doesn’t

Answer 19

produces a pulse of DC for every input cycle

Question 20

What is one disadvantage of the full wave rectifier?

Answer 20

The output voltage is half the input voltage

Question 21

At a given moment in the operation of an NPN transistor

Answer 21

electrons move across the forward biased emitter-base junction and into the base region

Question 22

For normal operation of a PNP transistor, how does the base need to be biased?

Answer 22

Negative with respect to the emitter