Download L6 – Ohms Law - TECC Science

ELECTRICITY
OHM'S LAW
This Circuit is called a test
circuit.
We can put components in
the gap to study or test
them.
You are going to repeat
Ohms experiment.
Rheostat set to high resistance
Voltage (v)
Current (A)
2
4
6
8
Rheostat set to medium resistance
Voltage (V Current (A)
2
4
6
8
Current
(Amps)
Medium
Resistance. A
small voltage
gives a big
current
High Resistance.
A big voltage
gives a small
current
Voltage (Volts)
A
B
C
This is Georg Ohm,
he discovered a
relationship
between voltage
and current.
Today you are
going to follow in
his footsteps!
Resistance is measured in Ohms, we use
the Greek letter omega for this:
Rheostat set to high resistance
Voltage (v)
Current (A)
Resistance
(Ω)
2
4
6
8
Rheostat set to medium resistance
Voltage (V
2
4
6
8
Current
(A)
Resistance
(Ω)
Challenge: - Can you relate
Ohms Law to Y=mX, the
equation for a line you
learned in Maths?
Prepare an explanation for
the rest of the class?