State Ohm's law. How can it be verified experimentally?

Ohm’s law states that voltage across a conductor is directly proportional to the current flowing through it, provided the temperature and physical conditions remain constant.

Experimental Verification of Ohm’s Law

The experiment that can easily verify Ohm’s Law is given below –
Apparatus Required:

Resistor
Voltmeter
Ammeter
Plug Key
Battery
Rheostat

Circuit Diagram:

Procedure:

The key K is initially closed, and the rheostat is adjusted to get the minimum reading in Ammeter A and voltmeter V.
The current is gradually increased in the circuit by moving the sliding terminal of the rheostat.
During the process, current flows in the circuit, and a corresponding value of potential difference across the resistance wire R is recorded.
Therefore, different sets of values of current and voltage are obtained.
For each set of values of V and I, the V/I ratio is calculated.
When you calculate V/I for each recording, you will observe that it is almost the same. So V/I = R is a constant.
Plot a graph of current against potential difference which will be a straight line.
This shows that the current is proportional to the potential difference.

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State Ohm's law. How can it be verified experimentally?

Experimental Verification of Ohm’s Law

CBSE CLASS XII Related Questions

3.
A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

4.
With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

Similar Physics Concepts

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State Ohm's law. How can it be verified experimentally?

Experimental Verification of Ohm’s Law

CBSE CLASS XII Related Questions

3.A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

4.With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

3.
A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

4.
With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.