153970 An electron is moving in an orbit of radius $R$ with a time period $T$ as shown in the figure. The magnetic moment produced may be given by

$|\vec{A}|=\pi R^{2}$

153971 Two bar magnet are placed in a vibration magnetometer and allowed to vibrate. They make 15 oscillations/min when their similar poles are on the same side, while they make 20 oscillations/min when their opposite poles lie on the same side. The ratio of their magnetic moments is

153972 A bar magnet is held perpendicular to a uniform field. If the couple acting on the magnet is to be halved by rotating it from above position, the angle by which it is to be rotated is :

153973 Two short magnets $A B$ and $C D$ are in the $X Y-$ plane and are parallel to $\mathrm{X}$-axis and coordinates of their centers respectively are $(0$, $2)$ and $(2,0)$. Line joining the north south poles of $C D$ is opposite to that of $A B$ and lies along the positive $X$-axis. The resultant field induction due to $A B$ and $C D$ at a point $P(2,2)$ is $100 \times 10^{-7} \mathrm{~T}$. When the poles of the magnet CD are reversed, the resultant field induction is $50 \times 10^{-7} \mathrm{~T}$. The value of magnetic moments of $\mathrm{AB}$ and $\mathrm{CD}$ (in $\mathrm{Am}^{2}$ ) are

153970 An electron is moving in an orbit of radius $R$ with a time period $T$ as shown in the figure. The magnetic moment produced may be given by

$|\vec{A}|=\pi R^{2}$

153971 Two bar magnet are placed in a vibration magnetometer and allowed to vibrate. They make 15 oscillations/min when their similar poles are on the same side, while they make 20 oscillations/min when their opposite poles lie on the same side. The ratio of their magnetic moments is

153972 A bar magnet is held perpendicular to a uniform field. If the couple acting on the magnet is to be halved by rotating it from above position, the angle by which it is to be rotated is :

153973 Two short magnets $A B$ and $C D$ are in the $X Y-$ plane and are parallel to $\mathrm{X}$-axis and coordinates of their centers respectively are $(0$, $2)$ and $(2,0)$. Line joining the north south poles of $C D$ is opposite to that of $A B$ and lies along the positive $X$-axis. The resultant field induction due to $A B$ and $C D$ at a point $P(2,2)$ is $100 \times 10^{-7} \mathrm{~T}$. When the poles of the magnet CD are reversed, the resultant field induction is $50 \times 10^{-7} \mathrm{~T}$. The value of magnetic moments of $\mathrm{AB}$ and $\mathrm{CD}$ (in $\mathrm{Am}^{2}$ ) are

153970 An electron is moving in an orbit of radius $R$ with a time period $T$ as shown in the figure. The magnetic moment produced may be given by

$|\vec{A}|=\pi R^{2}$

153971 Two bar magnet are placed in a vibration magnetometer and allowed to vibrate. They make 15 oscillations/min when their similar poles are on the same side, while they make 20 oscillations/min when their opposite poles lie on the same side. The ratio of their magnetic moments is

153972 A bar magnet is held perpendicular to a uniform field. If the couple acting on the magnet is to be halved by rotating it from above position, the angle by which it is to be rotated is :

153973 Two short magnets $A B$ and $C D$ are in the $X Y-$ plane and are parallel to $\mathrm{X}$-axis and coordinates of their centers respectively are $(0$, $2)$ and $(2,0)$. Line joining the north south poles of $C D$ is opposite to that of $A B$ and lies along the positive $X$-axis. The resultant field induction due to $A B$ and $C D$ at a point $P(2,2)$ is $100 \times 10^{-7} \mathrm{~T}$. When the poles of the magnet CD are reversed, the resultant field induction is $50 \times 10^{-7} \mathrm{~T}$. The value of magnetic moments of $\mathrm{AB}$ and $\mathrm{CD}$ (in $\mathrm{Am}^{2}$ ) are

153970 An electron is moving in an orbit of radius $R$ with a time period $T$ as shown in the figure. The magnetic moment produced may be given by

$|\vec{A}|=\pi R^{2}$

153971 Two bar magnet are placed in a vibration magnetometer and allowed to vibrate. They make 15 oscillations/min when their similar poles are on the same side, while they make 20 oscillations/min when their opposite poles lie on the same side. The ratio of their magnetic moments is

153972 A bar magnet is held perpendicular to a uniform field. If the couple acting on the magnet is to be halved by rotating it from above position, the angle by which it is to be rotated is :

153973 Two short magnets $A B$ and $C D$ are in the $X Y-$ plane and are parallel to $\mathrm{X}$-axis and coordinates of their centers respectively are $(0$, $2)$ and $(2,0)$. Line joining the north south poles of $C D$ is opposite to that of $A B$ and lies along the positive $X$-axis. The resultant field induction due to $A B$ and $C D$ at a point $P(2,2)$ is $100 \times 10^{-7} \mathrm{~T}$. When the poles of the magnet CD are reversed, the resultant field induction is $50 \times 10^{-7} \mathrm{~T}$. The value of magnetic moments of $\mathrm{AB}$ and $\mathrm{CD}$ (in $\mathrm{Am}^{2}$ ) are