Ohm’s Law is a fundamental law in Electrical Engineering. This article provides the Ohm’s Law Lab report which is based on the original statement. So let’s start our learning without any delay.

Objectives of Report

To prove the theoretical results of Ohm’s Law and verify them from practical results using 1k ohm Resistor.

Components

  • 1k Resistor
  • DC Power Supply (Variable)
  • Breadboard
  • Connecting wires
  • Ammeter
  • Resistor Colour Coding Chart

Circuit Diagram

Setup the circuit diagram as shown in figure:

circuit-diagram-for-ohm-law

Steps

  1. Set the initial voltage to 1V and measure the current flowing through the circuit.
  2. Now increase the voltage to 2V and again measure the current
  3. Repeat the above steps for 3, 4, 5 … 10 V respectively and note all your readings in the Observations table.

Observations table [Practical]

The observations table for my experiment is:

practical-results-of-ohm-law

Your readings will, of course, be different from mine, but they should closely match these values.

Calculations

Formula:

Original: V = IR,

In our experiment: I = V/R

On the other hand, the theoretical calculations for the experiment calculated through Ohm’s Calculator are:

ohms-law-table

Graphing the Values

By plotting voltage on the x-axis and taking current on the y-axis you will achieve these results:

ohms-law-experiment-report-graph

Here the orange line represents theoretical values and the blue line represents the practical values. After observing these values from Experiment report one can understand that there is little to no difference between both these values.

Conclusion

The experimental results in our laboratory closely matched the theoretical results of law. We learnt that for a linear component like resistor the statement ‘Voltage is directly proportional to the current’ is perfectly correct.