NCERT Solutions For Class 12 Physics Chapter 5: Magnetism and Matter

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NCERT Solutions for class 12 physics chapter 5 Magnetism and Matter are given in this article with a detailed explanation. Magnetism is a force by virtue of which a metal is attracted to certain materials, which are known as magnets. These days magnets have a lot of applications in areas such as an electric bell, telephone, radio, loudspeaker, motors, fans, screwdrivers, etc.

The chapter has a weightage of 5 to 6 marks in the CBSE Class 12 Physics Examination. The NCERT Solutions for Class 12 Physics Chapter 5 covers concepts of the dipole moment of a magnet, permanent magnets, classification of magnetic materials, etc.

Download PDF: NCERT Solutions for Class 12 Physics Chapter 5

NCERT Solutions for Class 12 Physics Chapter 5

NCERT solutions for class 12 physics chapter 5: Magnetism and Matter are given below.

Class 12 Physics Chapter 5 Magnetism and Matter – Important Concepts

Magnetic field lines are the imaginary lines along which the North Magnetic move.

The larger the number of magnetic field lines per unit area, the stronger the magnetic field will be.

When a magnet placed in a uniform magnetic field B experiences a dipole moment m, then it experiences a force, torque, and potential energy.

Force = zero
Torque = m*B
Potential energy = m*B.

Magnetic Materials are classified as Diamagnetic, paramagnetic, and ferromagnetic. χ refers to the magnetic sensitivity of the material.

Diamagnetic materials – negative and small χ
Paramagnetic materials – positive and small χ
Ferromagnetic materials – large χ.

The magnetic field of a solenoid with a radius, carrying I current at distance r on the axis is given by:

\(B = {\mu_0 \over 4\pi} {2m \over r^3}\)

In the above formula, m refers to the magnetic moment of the solenoid that is given by –

\(m = n(2l)(\pi a^2)\)

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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.
Two small identical metallic balls having charges \( q \) and \( -2q \) are kept far at a separation \( r \). They are brought in contact and then separated at distance \( \frac{r}{2} \). Compared to the initial force \( F \), they will now:
- attract with a force \( \frac{F}{2} \)
- repel with a force \( \frac{F}{2} \)
- repel with a force \( F \)
- attract with a force \( F \)
View Solution
3.
A light copper ring is freely suspended by a light string. A bar magnet is held horizontally with its length along the axis of the ring. The magnet is moved towards the ring with its N pole facing the loop. What will happen to the ring and its position? Explain.
View Solution
4.
The figure shows three point charges kept at the vertices of triangle ABC. The net electric field, due to this system of charges, at the midpoint M of base BC will be:
- \( \frac{q}{4 \pi \epsilon_0 l^2} \) pointing along MA
- \( \frac{q}{\pi \epsilon_0 l^2} \) pointing along AM
- \( \frac{q}{2 \pi \epsilon_0 l^2} \) pointing along AM
- Zero
View Solution
5.
Does a step up transformer contradict the principle of conservation of energy? Justify your answer.
View Solution
6.
Assertion (A) : The mass of a nucleus is less than the sum of the masses of the constituent nucleons. Reason (R) : Energy is absorbed when the nucleons are bound together to form a nucleus.
- 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

View All

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NCERT Solutions For Class 12 Physics Chapter 5: Magnetism and Matter

NCERT Solutions for Class 12 Physics Chapter 5

Class 12 Physics Chapter 5 Magnetism and Matter – Important Concepts

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.
Two small identical metallic balls having charges \( q \) and \( -2q \) are kept far at a separation \( r \). They are brought in contact and then separated at distance \( \frac{r}{2} \). Compared to the initial force \( F \), they will now:

3.
A light copper ring is freely suspended by a light string. A bar magnet is held horizontally with its length along the axis of the ring. The magnet is moved towards the ring with its N pole facing the loop. What will happen to the ring and its position? Explain.

4.
The figure shows three point charges kept at the vertices of triangle ABC. The net electric field, due to this system of charges, at the midpoint M of base BC will be:

5.
Does a step up transformer contradict the principle of conservation of energy? Justify your answer.

6.
Assertion (A) : The mass of a nucleus is less than the sum of the masses of the constituent nucleons. Reason (R) : Energy is absorbed when the nucleons are bound together to form a nucleus.

Similar Physics Concepts

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NCERT Solutions For Class 12 Physics Chapter 5: Magnetism and Matter

NCERT Solutions for Class 12 Physics Chapter 5

Class 12 Physics Chapter 5 Magnetism and Matter – Important Concepts

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.Two small identical metallic balls having charges \( q \) and \( -2q \) are kept far at a separation \( r \). They are brought in contact and then separated at distance \( \frac{r}{2} \). Compared to the initial force \( F \), they will now:

3.A light copper ring is freely suspended by a light string. A bar magnet is held horizontally with its length along the axis of the ring. The magnet is moved towards the ring with its N pole facing the loop. What will happen to the ring and its position? Explain.

4.The figure shows three point charges kept at the vertices of triangle ABC. The net electric field, due to this system of charges, at the midpoint M of base BC will be:

5.Does a step up transformer contradict the principle of conservation of energy? Justify your answer.

6.Assertion (A) : The mass of a nucleus is less than the sum of the masses of the constituent nucleons. Reason (R) : Energy is absorbed when the nucleons are bound together to form a nucleus.

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.
Two small identical metallic balls having charges \( q \) and \( -2q \) are kept far at a separation \( r \). They are brought in contact and then separated at distance \( \frac{r}{2} \). Compared to the initial force \( F \), they will now:

3.
A light copper ring is freely suspended by a light string. A bar magnet is held horizontally with its length along the axis of the ring. The magnet is moved towards the ring with its N pole facing the loop. What will happen to the ring and its position? Explain.

4.
The figure shows three point charges kept at the vertices of triangle ABC. The net electric field, due to this system of charges, at the midpoint M of base BC will be:

5.
Does a step up transformer contradict the principle of conservation of energy? Justify your answer.

6.
Assertion (A) : The mass of a nucleus is less than the sum of the masses of the constituent nucleons. Reason (R) : Energy is absorbed when the nucleons are bound together to form a nucleus.