2. Charging
Charging an object consists in
creating an imbalance on the
electrical charge of that object.
What are some examples?
Electrolytic Solutions pg 142
4. Semi-conductors
Substance that has an electrical
conductivity between that of a
conductor and insulator.
This allows it to control the amount
and direction of the flow.
5. Insulators
Substance that does NOT allow free
flow of electrical charges to pass
Ex.
Plastic, Wood, Paper,
Rubber, Glass, Ceramics
6. Water is NOT a good
conductor
Nichrome is a POOR
conductor
used in resistors,
toasters, radiators…
7. Conductance (G):
Is a number that tells you how
well electrical current flows
Characteristic property
Measured in Seimens “S”
Conductors have HIGH
conductance
Insulator have LOW conductance
8. Conductance
of a wire depends
on:
Length
Diameter
Temp
Material
Copper
is the BEST
Metals better than non-metals
9. Which is a better conductor?
Plastic
Wood
Copper
Iron
SHORT
FAT
COLD
Which metal wire has the best
conductance?
10. Which wire is the best conductor?
Wood
55 C
o
SHORT
FAT
COLD
Copper
25 C
o
Copper
25 C
o
Copper
55 C
o
Aluminum
25 C
o
Copper
5C
o
11.
Copper is the best conductor
Wires that are:
SHORT
FAT
COLD
have a high
conductance
Nichrome is the best resistor