ohms law

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