ELECTRONICS 1A PHS 206 
ELECTRONICS 1A (PHS 206)
COURSE CONTENT:
1.ELECTRONS IN MATTER
2.ELECTRON EMISSION
INTRODUCTION
The Word Electronics derived its name from
electrons in all materials.
It is a branch of Science, Technology and
Engineering that deals with current conduction through vacuum, gas, solidsmatter in general.
It deals with electronic device and their utilization. INTRODUCTION contd
Electronic device is that in which current
flows through a matter.
Such devices have valuable properties which enables them to function and behave as the friend of man today. Eg your cell phones, laptops, etc.
MATTER
Matter is anything that has mass and
occupies space.
It exists in three (3) states:
1. gas
2. liquid
3. solid
GAS
Gases: A gas is a compressible fluid. Not only will
a gas conform to the shape of its container but it will also expand to fill the container.
In a gas, the molecules have enough kinetic energy so that the effect of intermolecular forces is small (or zero for an ideal gas).
gases are well separated with no regular arrangement. They vibrate and move freely at high speeds.
A gas has no definite shape or volume, but occupies the entire container in which it is confined. LIQUID
Liquids: liquid are close together with no
regular arrangement.
liquid vibrate, move about, and slide past each other in haphazardly manner.
.
SOLIDS
Solids : In a solid the particles (ions, atoms
or molecules) are tightly packed, usually in a regular pattern called crystal lattice.
The forces between particles are strong so that the particles cannot move freely but can only vibrate. As a result, a solid has a stable, definite shape, and a definite volume. Solids can only change their shape by force, when bonds keeping them in place are broken.
SUMMARY OF PROPERTIES OF MATTER
Forms of matter
Matter is found in the form of either
elements or compounds.
An element is a substance which cannot be broken down any further by chemical methods into simpler
COURSE CONTENT:
1.ELECTRONS IN MATTER
2.ELECTRON EMISSION
INTRODUCTION
The Word Electronics derived its name from
electrons in all materials.
It is a branch of Science, Technology and
Engineering that deals with current conduction through vacuum, gas, solidsmatter in general.
It deals with electronic device and their utilization. INTRODUCTION contd
Electronic device is that in which current
flows through a matter.
Such devices have valuable properties which enables them to function and behave as the friend of man today. Eg your cell phones, laptops, etc.
MATTER
Matter is anything that has mass and
occupies space.
It exists in three (3) states:
1. gas
2. liquid
3. solid
GAS
Gases: A gas is a compressible fluid. Not only will
a gas conform to the shape of its container but it will also expand to fill the container.
In a gas, the molecules have enough kinetic energy so that the effect of intermolecular forces is small (or zero for an ideal gas).
gases are well separated with no regular arrangement. They vibrate and move freely at high speeds.
A gas has no definite shape or volume, but occupies the entire container in which it is confined. LIQUID
Liquids: liquid are close together with no
regular arrangement.
liquid vibrate, move about, and slide past each other in haphazardly manner.
.
SOLIDS
Solids : In a solid the particles (ions, atoms
or molecules) are tightly packed, usually in a regular pattern called crystal lattice.
The forces between particles are strong so that the particles cannot move freely but can only vibrate. As a result, a solid has a stable, definite shape, and a definite volume. Solids can only change their shape by force, when bonds keeping them in place are broken.
SUMMARY OF PROPERTIES OF MATTER
Forms of matter
Matter is found in the form of either
elements or compounds.
An element is a substance which cannot be broken down any further by chemical methods into simpler