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

1.
Write two advantages of reflecting telescope over refracting telescope.

3.
Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

5.
With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

6.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

Similar Physics Concepts

Comments

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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

1.Write two advantages of reflecting telescope over refracting telescope.

3.Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

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

6.This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
Write two advantages of reflecting telescope over refracting telescope.

3.
Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

5.
With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

6.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?