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