Ohm's law explains the relationship between voltage, current, and resistance in a circuit. Voltage is the pressure behind current flow, measured in volts. Current refers to the quantity of electrical flow, measured in amps. Resistance opposes current flow, measured in ohms. According to Ohm's law, if voltage is constant, increasing resistance decreases current, and decreasing resistance increases current.

2. Ohm’s Law explains the
relationship between voltage (V or
E), current (I) and resistance (R)
 Used by electricians, automotive
technicians, stereo installers

3. It is the push or pressure behind
current flow through a circuit, and
is measured in (V) volts.


4. Current refers to the
quantity/volume of electrical flow.
Measured in Amps (A)

5.  Resistance to the flow of the current.
Measured in Ohms

7. 1. Assuming the resistance does not change:
As voltage increases, current increases.
as voltage decreases, current decreases.
2. Assuming the voltage does not change:
As resistance increases, current decreases.
As resistance decreases, current increases.

8. What is Voltage?
What is Current?
What is Resistance?

9. http://www.youtube.com/watch?v=eZ9Xk0Lln5Y&feature
Stop at 1 Min mark

11. V (E) = I x R
I = V
R
R = V
I

12. Battery voltage is 12V
Current is Amp ?
Resistance 2 Ohm

13. Voltage is 12V
Current is 4 Amps
Resistance Ohms ?

14. Multi meters/ DVOM

15. Why do we need resistors
To decrease the amount of voltage applied
to a component
The value of the resistor is marked on the
body using coloured rings

18. What is Voltage?
What is Current?
What is Resistance?
http://www.youtube.com/watch?v=nj7ewZmG3eo&feature=related

19. http://www.youtube.com/watch?v=YB_JCUw9SoU&featur

20. What is a load
It is a any electric load on a circuit that does work.
Example: Power windows, light bulbs, motors.

21. Series circuit :
One pathway for current to flow.
Example: Old Christmas lights

22. More then one path way for current to
flow.
Used in most electrical vehicle circuits.

23. 12