Measurement of Ohmic Resistances Using Ammeter and Voltmeter - Ohm's Law Simulation

Theoretical Background / Context

• According to Ohm’s law, potential difference between two points of a resistor is directly proportional to the current flowing through this resistor at constant temperature using an Ohmic meter for resistance measurement.
• The proportionality constant is called resistance. 

Ohm's law formula for resistance:  V = I R
 

When a number of resistances are connected on series, the total resistance will be:

But, If they are connected on parallel , their total resistance will be:

Principle of Work

• In Ohm’s law simulation, If we measure the potential difference across the resistor and current passing through it, and plot a graph between them, a straight line passes through the origin is obtained whose slope is related to the resistance of the resistor. 
• The same procedure is repeated in Ohm’s law simulation to verify the series and parallel connection formulae for resistors.