00. Magnet and Magnetic Dipole
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Magnetism and Matter

153977 Assertion (A) : Non- polar materials do not have any permanent dipole moment.
Reason (R) : When a non-polar material is placed in an electric field, the centre of the positive charge distribution of it's individual atom or molecule coincides with the centre of the negative charge distribution.
In the light of above statements, choose the most appropriate answer from the options given below.

1 Both (A) and (R) are cprrect and (R) is the correct explanation of (A).
2 Both (A) and (R) are cprrect and (R) is not the correct explanation of $(\mathrm{A})$.
3 (A) is correct but (R) is not correct.
4 (A) is not correct but (R) is correct.
JEE Main-26.06.2022
Magnetism and Matter

153981 Assertion (A): It is more difficult to move a magnet into a coil with more loops
Reason ( $R$ ): This is because emf induced in each current loop resists the motion of the magnet

1 Both $\mathbf{A}$ and $\mathbf{R}$ true and $\mathbf{R}$ is a correct explanation for $\mathbf{A}$
2 Both $\mathbf{A}$ and $\mathbf{R}$ are true but $\mathbf{R}$ is not a correct explanation for $\mathbf{A}$
3 $\mathbf{A}$ is true $\mathbf{R}$ is false
4 $\mathbf{A}$ is false $\mathbf{R}$ is true
AP EAMCET-19.08.2021
Magnetism and Matter

153984 What is the magnitude of the equatorial field due to a bar magnet of length $5.0 \mathrm{~cm}$ at a distance $75 \mathrm{~cm}$ from its mid point? The magnetic moment of the bar magnet is 0.75 $\mathbf{A m}^{2}$.

1 $3.2 \times 10^{-7} \mathrm{~T}$
2 $1.78 \times 10^{-7} \mathrm{~T}$
3 $6.4 \times 10^{-7} \mathrm{~T}$
4 $3.56 \times 10^{-7} \mathrm{~T}$
GUJCET-PCE- 2021
Magnetism and Matter

153985 Circular loop having radius $r$, carrying current I, produces magnetic field at the centre loop is B. What will be the magnetic dipole moment of this loop?

1 $\frac{4 \pi \mathrm{Br}^{3}}{\mu_{\mathrm{o}}}$
2 $\frac{2 \pi \mathrm{Br}^{3}}{\mu_{\mathrm{o}}}$
3 $\frac{\pi \mathrm{Br}^{3}}{\mu_{\mathrm{o}}}$
4 $\frac{\pi \mathrm{Br}^{3}}{4 \mu_{\mathrm{o}}}$
GUJCET-PCE- 2021
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Magnetism and Matter

153977 Assertion (A) : Non- polar materials do not have any permanent dipole moment.
Reason (R) : When a non-polar material is placed in an electric field, the centre of the positive charge distribution of it's individual atom or molecule coincides with the centre of the negative charge distribution.
In the light of above statements, choose the most appropriate answer from the options given below.

1 Both (A) and (R) are cprrect and (R) is the correct explanation of (A).
2 Both (A) and (R) are cprrect and (R) is not the correct explanation of $(\mathrm{A})$.
3 (A) is correct but (R) is not correct.
4 (A) is not correct but (R) is correct.
JEE Main-26.06.2022
Magnetism and Matter

153981 Assertion (A): It is more difficult to move a magnet into a coil with more loops
Reason ( $R$ ): This is because emf induced in each current loop resists the motion of the magnet

1 Both $\mathbf{A}$ and $\mathbf{R}$ true and $\mathbf{R}$ is a correct explanation for $\mathbf{A}$
2 Both $\mathbf{A}$ and $\mathbf{R}$ are true but $\mathbf{R}$ is not a correct explanation for $\mathbf{A}$
3 $\mathbf{A}$ is true $\mathbf{R}$ is false
4 $\mathbf{A}$ is false $\mathbf{R}$ is true
AP EAMCET-19.08.2021
Magnetism and Matter

153984 What is the magnitude of the equatorial field due to a bar magnet of length $5.0 \mathrm{~cm}$ at a distance $75 \mathrm{~cm}$ from its mid point? The magnetic moment of the bar magnet is 0.75 $\mathbf{A m}^{2}$.

1 $3.2 \times 10^{-7} \mathrm{~T}$
2 $1.78 \times 10^{-7} \mathrm{~T}$
3 $6.4 \times 10^{-7} \mathrm{~T}$
4 $3.56 \times 10^{-7} \mathrm{~T}$
GUJCET-PCE- 2021
Magnetism and Matter

153985 Circular loop having radius $r$, carrying current I, produces magnetic field at the centre loop is B. What will be the magnetic dipole moment of this loop?

1 $\frac{4 \pi \mathrm{Br}^{3}}{\mu_{\mathrm{o}}}$
2 $\frac{2 \pi \mathrm{Br}^{3}}{\mu_{\mathrm{o}}}$
3 $\frac{\pi \mathrm{Br}^{3}}{\mu_{\mathrm{o}}}$
4 $\frac{\pi \mathrm{Br}^{3}}{4 \mu_{\mathrm{o}}}$
GUJCET-PCE- 2021
NEET DIGITAL LIBRARY
Magnetism and Matter

153977 Assertion (A) : Non- polar materials do not have any permanent dipole moment.
Reason (R) : When a non-polar material is placed in an electric field, the centre of the positive charge distribution of it's individual atom or molecule coincides with the centre of the negative charge distribution.
In the light of above statements, choose the most appropriate answer from the options given below.

1 Both (A) and (R) are cprrect and (R) is the correct explanation of (A).
2 Both (A) and (R) are cprrect and (R) is not the correct explanation of $(\mathrm{A})$.
3 (A) is correct but (R) is not correct.
4 (A) is not correct but (R) is correct.
JEE Main-26.06.2022
Magnetism and Matter

153981 Assertion (A): It is more difficult to move a magnet into a coil with more loops
Reason ( $R$ ): This is because emf induced in each current loop resists the motion of the magnet

1 Both $\mathbf{A}$ and $\mathbf{R}$ true and $\mathbf{R}$ is a correct explanation for $\mathbf{A}$
2 Both $\mathbf{A}$ and $\mathbf{R}$ are true but $\mathbf{R}$ is not a correct explanation for $\mathbf{A}$
3 $\mathbf{A}$ is true $\mathbf{R}$ is false
4 $\mathbf{A}$ is false $\mathbf{R}$ is true
AP EAMCET-19.08.2021
Magnetism and Matter

153984 What is the magnitude of the equatorial field due to a bar magnet of length $5.0 \mathrm{~cm}$ at a distance $75 \mathrm{~cm}$ from its mid point? The magnetic moment of the bar magnet is 0.75 $\mathbf{A m}^{2}$.

1 $3.2 \times 10^{-7} \mathrm{~T}$
2 $1.78 \times 10^{-7} \mathrm{~T}$
3 $6.4 \times 10^{-7} \mathrm{~T}$
4 $3.56 \times 10^{-7} \mathrm{~T}$
GUJCET-PCE- 2021
Magnetism and Matter

153985 Circular loop having radius $r$, carrying current I, produces magnetic field at the centre loop is B. What will be the magnetic dipole moment of this loop?

1 $\frac{4 \pi \mathrm{Br}^{3}}{\mu_{\mathrm{o}}}$
2 $\frac{2 \pi \mathrm{Br}^{3}}{\mu_{\mathrm{o}}}$
3 $\frac{\pi \mathrm{Br}^{3}}{\mu_{\mathrm{o}}}$
4 $\frac{\pi \mathrm{Br}^{3}}{4 \mu_{\mathrm{o}}}$
GUJCET-PCE- 2021
Join With Us for More Updates
Magnetism and Matter

153977 Assertion (A) : Non- polar materials do not have any permanent dipole moment.
Reason (R) : When a non-polar material is placed in an electric field, the centre of the positive charge distribution of it's individual atom or molecule coincides with the centre of the negative charge distribution.
In the light of above statements, choose the most appropriate answer from the options given below.

1 Both (A) and (R) are cprrect and (R) is the correct explanation of (A).
2 Both (A) and (R) are cprrect and (R) is not the correct explanation of $(\mathrm{A})$.
3 (A) is correct but (R) is not correct.
4 (A) is not correct but (R) is correct.
JEE Main-26.06.2022
Magnetism and Matter

153981 Assertion (A): It is more difficult to move a magnet into a coil with more loops
Reason ( $R$ ): This is because emf induced in each current loop resists the motion of the magnet

1 Both $\mathbf{A}$ and $\mathbf{R}$ true and $\mathbf{R}$ is a correct explanation for $\mathbf{A}$
2 Both $\mathbf{A}$ and $\mathbf{R}$ are true but $\mathbf{R}$ is not a correct explanation for $\mathbf{A}$
3 $\mathbf{A}$ is true $\mathbf{R}$ is false
4 $\mathbf{A}$ is false $\mathbf{R}$ is true
AP EAMCET-19.08.2021
Magnetism and Matter

153984 What is the magnitude of the equatorial field due to a bar magnet of length $5.0 \mathrm{~cm}$ at a distance $75 \mathrm{~cm}$ from its mid point? The magnetic moment of the bar magnet is 0.75 $\mathbf{A m}^{2}$.

1 $3.2 \times 10^{-7} \mathrm{~T}$
2 $1.78 \times 10^{-7} \mathrm{~T}$
3 $6.4 \times 10^{-7} \mathrm{~T}$
4 $3.56 \times 10^{-7} \mathrm{~T}$
GUJCET-PCE- 2021
Magnetism and Matter

153985 Circular loop having radius $r$, carrying current I, produces magnetic field at the centre loop is B. What will be the magnetic dipole moment of this loop?

1 $\frac{4 \pi \mathrm{Br}^{3}}{\mu_{\mathrm{o}}}$
2 $\frac{2 \pi \mathrm{Br}^{3}}{\mu_{\mathrm{o}}}$
3 $\frac{\pi \mathrm{Br}^{3}}{\mu_{\mathrm{o}}}$
4 $\frac{\pi \mathrm{Br}^{3}}{4 \mu_{\mathrm{o}}}$
GUJCET-PCE- 2021
For More Updates join with Us