Experiment No: 01
Experiment Name: Study of the Ohm's Law
Objective: The objective of this experiment is to study and verify Ohm's Law, which states that the
current passing through a conductor between two points is directly proportional to the voltage across
the two points, given a constant temperature.
Theory: Ohm's Law is one of the fundamental principles in electrical engineering and physics. It is
expressed mathematically as V=IR, where V is the voltage across the conductor, I is the current
flowing through the conductor, and R is the resistance of the conductor. This relationship holds true
for conductors that obey Ohm's Law, i.e., where the resistance remains constant over the range of
voltages and currents being tested.
Apparatus:
• Variable Voltage supply
• Resistor (5 ohm)
• Ammeter
• Voltmeter
• Connecting wires
• Breadboard (if applicable)
Circuit Diagram:
[Insert Circuit Diagram Figure Here] (Add variable DC source, ammeter, resistor in series)
Observation:
Voltage (V) Measured Current (A) Calculated Current (A) Error (%)
2.0 0.5 0.4 25
4.0 1.0 1.0 0
6.0 1.5 1.5 0
8.0 2.0 2.0 0
10.0 2.5 2.5 0
Wave Shape: If an oscilloscope is used, you might observe a linear relationship between voltage and
current, indicating that the circuit obeys Ohm's Law. [Add graph V in the x-axis, current in the y-axis]
Result & Discussion: The experiment confirms Ohm's Law, as evidenced by the linear relationship
between voltage and current. The calculated current values closely match the measured values,
indicating minimal error. Any discrepancies in the observed and calculated values may be due to
experimental error, such as inaccuracies in measurement instruments or variations in the resistance of
the components. Overall, the experiment demonstrates the validity of Ohm's Law for the given
resistor and circuit setup.
