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.

Related Questions:

Read More:

Ohm’s Law – Important Concepts
Electromotive Force	Difference between RTD and thermocouple	Current Density
Wheatstone Bridge	Relation between kva and kw	Derivation of Drift Velocity
Potentiometer	Cells, emf, Internal Resistance	Unit of Specific Resistance
Static Electricity	Difference between AC and DC	Resistor Colour Codes
Ampere	Difference between kva and kw	Permittivity And Permeability
Electric Dipole	Resistivity Temperature Dependence	Unit of Current
Meter Bridge	Cells in Series and in Parallel	Current Electricity
Kirchhoff’s Rules	Difference between air conditioning and refrigeration	Internal resistance formula
Types of Current	Relation between resistance and length	Types of Resistors
Current density formula	Difference Between Primary Cell and Secondary Cell	Electrical Formula
Drift Velocity	Differences Between Acceleration and Velocity	Power Of Alternating Current
Resistivity formula	Current Electricity NCERT Solutions	Combination of Resistors
Carbon Resistor	Difference between earth and neutral	Resistance Formula
Uses of Resistor	Difference between emf and voltage	Circuit Diagram
Power transformers	Relation between power and resistance	Voltage divider formula

CBSE CLASS XII Related Questions

1.
Photoemission of electrons occurs from a metal (\( \phi_0 = 1.96 \, \text{eV} \)) when light of frequency \( 6.4 \times 10^{14} \, \text{Hz} \) is incident on it. Calculate: Energy of a photon in the incident light, The maximum kinetic energy of the emitted electrons, and The stopping potential.

View Solution

2.
Draw the number of scattered particles versus the scattering angle graph for scattering of alpha particles by a thin foil. Write two important conclusions that can be drawn from this plot.

View Solution

3.
Assertion (A) : All atoms have a net magnetic moment. Reason (R) : A current loop does not always behave as a magnetic dipole.

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Both Assertion (A) and Reason (R) are false.

View Solution

4.
What is displacement current (\( i_d \))? Considering the case of charging of a capacitor, show that \( i_d = \varepsilon_0 \frac{d\Phi_E}{dt} \). What is the value of \( i_d \) for a conductor across which a constant voltage is applied?

View Solution

5.
Two heaters rated as \((P_1,V)\) and \((P_2,V)\) are connected in series across a dc source of \(V/2\) volt. The power consumed by the combination will be –

\((P_1+P_2)\)
\(\dfrac{P_1+P_2}{2}\)
\(\dfrac{P_1P_2}{2(P_1+P_2)}\)
\(\dfrac{P_1P_2}{4(P_1+P_2)}\)

View Solution

6.
Write any two features of nuclear forces.

View Solution

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

Experimental Verification of Ohm’s Law

CBSE CLASS XII Related Questions

1.
Photoemission of electrons occurs from a metal (\( \phi_0 = 1.96 \, \text{eV} \)) when light of frequency \( 6.4 \times 10^{14} \, \text{Hz} \) is incident on it. Calculate: Energy of a photon in the incident light, The maximum kinetic energy of the emitted electrons, and The stopping potential.

2.
Draw the number of scattered particles versus the scattering angle graph for scattering of alpha particles by a thin foil. Write two important conclusions that can be drawn from this plot.

3.
Assertion (A) : All atoms have a net magnetic moment. Reason (R) : A current loop does not always behave as a magnetic dipole.

4.
What is displacement current (\( i_d \))? Considering the case of charging of a capacitor, show that \( i_d = \varepsilon_0 \frac{d\Phi_E}{dt} \). What is the value of \( i_d \) for a conductor across which a constant voltage is applied?

5.
Two heaters rated as \((P_1,V)\) and \((P_2,V)\) are connected in series across a dc source of \(V/2\) volt. The power consumed by the combination will be –

6.
Write any two features of nuclear forces.

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

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

Experimental Verification of Ohm’s Law

CBSE CLASS XII Related Questions

1.Photoemission of electrons occurs from a metal (\( \phi_0 = 1.96 \, \text{eV} \)) when light of frequency \( 6.4 \times 10^{14} \, \text{Hz} \) is incident on it. Calculate: Energy of a photon in the incident light, The maximum kinetic energy of the emitted electrons, and The stopping potential.

2. Draw the number of scattered particles versus the scattering angle graph for scattering of alpha particles by a thin foil. Write two important conclusions that can be drawn from this plot.

3.Assertion (A) : All atoms have a net magnetic moment. Reason (R) : A current loop does not always behave as a magnetic dipole.

4.What is displacement current (\( i_d \))? Considering the case of charging of a capacitor, show that \( i_d = \varepsilon_0 \frac{d\Phi_E}{dt} \). What is the value of \( i_d \) for a conductor across which a constant voltage is applied?

5.Two heaters rated as \((P_1,V)\) and \((P_2,V)\) are connected in series across a dc source of \(V/2\) volt. The power consumed by the combination will be –

6. Write any two features of nuclear forces.

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
Photoemission of electrons occurs from a metal (\( \phi_0 = 1.96 \, \text{eV} \)) when light of frequency \( 6.4 \times 10^{14} \, \text{Hz} \) is incident on it. Calculate: Energy of a photon in the incident light, The maximum kinetic energy of the emitted electrons, and The stopping potential.

2.
Draw the number of scattered particles versus the scattering angle graph for scattering of alpha particles by a thin foil. Write two important conclusions that can be drawn from this plot.

3.
Assertion (A) : All atoms have a net magnetic moment. Reason (R) : A current loop does not always behave as a magnetic dipole.

4.
What is displacement current (\( i_d \))? Considering the case of charging of a capacitor, show that \( i_d = \varepsilon_0 \frac{d\Phi_E}{dt} \). What is the value of \( i_d \) for a conductor across which a constant voltage is applied?

5.
Two heaters rated as \((P_1,V)\) and \((P_2,V)\) are connected in series across a dc source of \(V/2\) volt. The power consumed by the combination will be –

6.
Write any two features of nuclear forces.