TWU Physics Laboratory | Ohm’s Law
Ohm’s Law
Partner:
Resistance (Ω)
Voltage (V)
Current (A)
Voltage/Resistance (A)
102
1.486
0.01327
0.00146
556
1.500
0.00254
0.00269
219
1.495
0.00626
0.00683
326
1.498
0.00445
0.00459
984
1.502
0.00139
0.00153
98600
1.505
1.5*10^-5 1.53*10^-5
21700
1.505
6.8*10^-6
6.9*10^-6
Table 3.1
Discussion
➀ From your graph, what is the mathematical relationship between Current and Resistance?
V= IR
So from the graph, I = 1/R which means Current is inversely proportional to resistance.
➁ From your table, what is the relation between the column showing current and the
calculated ratios of Voltage/Resistance? Do your data obey Ohm’s Law? (I= V/R)?
Yes, our graph obeys ohm’s law. Since I= V/R which means Current (I ) is inversely
proportional to Resistance (R).
➂ What were possible sources of experimental error in this lab?
There are some reasons which might cause the data to fluctuate a little bit. Some reasons
might be mechanical errors with the multimeter. Short circuit between the input
terminals might have hamper the flow of electric current through the circuits. There also
might be a chance of data (V/R) being little off compared to Current (A) due to
recording or calculations errors
TWU Physics Laboratory | Ohm’s Law
Graph: