HISTORY OF ELETRONICS

Question 1

the branch of science that deals with the study of flow and control of electrons (electricity) and the study of their behavior and effects in vacuums, gases, and semiconductors, and with devices using such electrons

Answer 1

Electronics

Question 2

The 3 scientists that invented the bipolar transistor in 1947.

Answer 2

Bardeen, Shockley, and Brattain

Question 3

This was one of the first electronic devices before the transistors

Answer 3

Vaccuum Tubes

Question 4

All matter is made up of countless tiny particles whizzing around. These particles are extremely dense; matter is mostly empty space.

PARTICLE THAT MAKES UP MATTER

Answer 4

ATOMS

Question 5

Eventually, scientists identified 92 different kinds of fundamental substances in nature, and called them elements. Later, a few more elements were artificially made.

Simply states that matter is made up of atoms that can’t be separated

Answer 5

Atomic Theory

Question 6

The part of an atom that gives an element its identity
It is made up of protons and neutrons

Answer 6

Nucleus

Question 7

What gives an element its identity?
What makes it unique and different

Answer 7

Atomic Number (Number of Protons)

Question 8

variation of element having a different number of neutron.

Answer 8

Isotopes

Question 9

TRUE OR FALSE:
Proton is positively charged while Electrons is Negatively charged

Answer 9

True

Question 10

much lighter than protons or neutrons and is negatively charged.

Answer 10

Electron

Question 11

Different elements can join together to share electrons.

Answer 11

Compounds
or Chemical Compounds

Question 12

a substance in which the electrons
are mobile.

Answer 12

Electrical Conductors

Question 13

The best conductor at room temperature

Answer 13

Pure Elemental Silver

Question 14

In most electrical circuits and systems, ______ or __________ wire is used.

Answer 14

Cooper or Aluminum

Question 15

This type of conductor is impractical because of its high cost

Answer 15

Silver

Question 16

Substances that prevent electrical currents from flowing, except possibly in very small amounts

Answer 16

Insulators

Question 17

An insulating material is sometimes called a _________.

Answer 17

Dielectric.

Question 18

When Electrical insulators are forced to carry current what takes place?

Answer 18

Ionization

Question 19

electrons flow, but not as well as they do
in a conductor

Answer 19

Semiconductor

Question 20

A bonding of atoms, strengthened by the sharing of electrons

Answer 20

Covalent Bonding

Question 21

Those semiconductors that have been carefully refined to reduce the impurities to a very low level—essentially as pure as can be made available through modern technology.

Answer 21

Intrinsic Materials

Question 22

An increase in temperature of a semiconductor can result in a substantial increase in the number of free electrons in the material.

Answer 22

Temperature Coefficient

Question 23

A semiconductor material that has been subjected to the doping process

Answer 23

Extrinsic Material

Question 24

created by introducing those impurity elements that have five valence electrons (pentavalent).

Answer 24

N-Type Material

Question 25

Diffused impurities with five valence electrons are called

Answer 25

Donor Atoms

Question 26

formed by doping a pure germanium or silicon crystal with impurity atoms having three valence electrons.

Answer 26

P-Type Material

Question 27

Examples of N-Type Material

Answer 27

Antimony, arsenic, and phosphorus.

Question 28

Examples of P-type Material

Answer 28

Boron, Gallium, Indium

Question 29

The diffused impurities with three valence electrons are called

Answer 29

Acceptor atoms

Question 30

Majority Carrier in N-Type

Answer 30

Electrons

Question 31

Majority Carrier in P-Type

Answer 31

Holes