PLEASE REVIEW INFORMATION
Ohm’s Law
Theory
Ohm’s law states that the current through a conductor between two points is directly proportional to the voltage across the two points and inverse proportional with the resistance.
V = I R
V = Voltage
I = Current
R = Resistant
Procedure
The lab activity uses a simulation developed by the University of Colorado at Colorado Boulder.
1. Set the value of R to 75 Ω by adjusting the slide bar.
2. Set the value of V to 1.5V by adjusting the slide bar.
3. Record the value of the electric current in the table. Notice that mA=10-3A.
5. Take a screen shot of the circuit with and paste it below:
6. Repeat step 2 and 3 for V = 4.5 v and V = 6 v and write down the results at third and fourth rows.
|
|
1.5 | |
3 | |
4.5 | |
6 |
7. Plot the graph of V vs I
V (Volt) on the Y axis and I (Amps) on X axis
) and Paste it here. Please use graphing paper or EXCEL for the graph. (I [Current] should be in Amps not in mA)
8. What is the slope of the graph using the EXCEL features or by calculating it as raise/run. How is the slope compare with the value or R?
9. A circuit has battery of 2.5V and a current of 0.5A. What is resistance of the circuit ?
