The primary objective of the laboratory was to verify ohm’s law while also getting familiar with electrical circuits in the process.
Relevant Theory and Mathematical Relations:
The electrical current is the amount of charge passing by a given point in a conducting path circuit per unit time:
I= dQ/dt
For many materials and devices used in electrical circuits, particularly metallic conductors, the difference of potential V applied across the device is related to the circuit I flowing through the device by the equation:
V = RI
Where:
V is the difference of potential or voltage across the device in volts (V),
I is the current flowing through the device in amperes (A),
R is the resistance of the device in Ohms (Ω).
The power delivered by a source of voltage to a device can be expressed as:
P = VI
In the case of an ohmic device, the power can be expressed as:
P = RI2
Result:
Graph 1
Graph 2
Discussion/Conclusions:
Ohm's Law states that V=RI where V is the difference of potential or voltage across the device in volts (V), I is the current flowing through the device in amperes (A), R is the resistance of the device in Ohms (Ω).When the Y-intercept on the conductor graph is examined, it is quite evident that the R (resistance) values overlap. Interestingly, it appears that the origin (0,0) is within experimental error for the y-intercept of the graph. Moreover, the plot of the voltage drop across the conductor vs the current in the conductor results in a straight line (represents a linear correlation). This thus indicates that
