154058 A 100 turn closely wound circular coil of radius $10 \mathrm{~cm}$ carries a current of $3.2 \mathrm{~A}$. The magnetic moment of the coil is, approximately,

154059 Two wires $A$ and $B$ have lengths of $40 \mathrm{~cm}$ and $30 \mathrm{~cm}$. $A$ is bent into a circle of radius $r$ and $B$ into an arc of radius $r$. A current $I_{1}$, is passed through $A$ and $I_{2}$ through $B$. To have the same magnetic induction at the centre, the ratio of $I_{1}: I_{2}$ is

154060 Uniform magnetic field $B$ is directed vertically upwards and 3 wires of equal length $L$, carrying equal current $I$ are lying in a horizontal plane such that the first one is along north, second one along north-east and the third one at $60^{\circ}$ north of east. Force exerted by magnetic field $B$ on them is

154064 Two magnets $A$ and $B$ having the same mass and length are suspended and made to oscillate freely with time periods $T_{A}$ and $T_{B}$. If the moment of inertia of $A$ is one fourth that of $B$, the ratio of $\mathbf{T}_{B}$ to $\mathbf{T}_{\mathrm{A}}$ is

154058 A 100 turn closely wound circular coil of radius $10 \mathrm{~cm}$ carries a current of $3.2 \mathrm{~A}$. The magnetic moment of the coil is, approximately,

154059 Two wires $A$ and $B$ have lengths of $40 \mathrm{~cm}$ and $30 \mathrm{~cm}$. $A$ is bent into a circle of radius $r$ and $B$ into an arc of radius $r$. A current $I_{1}$, is passed through $A$ and $I_{2}$ through $B$. To have the same magnetic induction at the centre, the ratio of $I_{1}: I_{2}$ is

154060 Uniform magnetic field $B$ is directed vertically upwards and 3 wires of equal length $L$, carrying equal current $I$ are lying in a horizontal plane such that the first one is along north, second one along north-east and the third one at $60^{\circ}$ north of east. Force exerted by magnetic field $B$ on them is

154064 Two magnets $A$ and $B$ having the same mass and length are suspended and made to oscillate freely with time periods $T_{A}$ and $T_{B}$. If the moment of inertia of $A$ is one fourth that of $B$, the ratio of $\mathbf{T}_{B}$ to $\mathbf{T}_{\mathrm{A}}$ is

154058 A 100 turn closely wound circular coil of radius $10 \mathrm{~cm}$ carries a current of $3.2 \mathrm{~A}$. The magnetic moment of the coil is, approximately,

154059 Two wires $A$ and $B$ have lengths of $40 \mathrm{~cm}$ and $30 \mathrm{~cm}$. $A$ is bent into a circle of radius $r$ and $B$ into an arc of radius $r$. A current $I_{1}$, is passed through $A$ and $I_{2}$ through $B$. To have the same magnetic induction at the centre, the ratio of $I_{1}: I_{2}$ is

154060 Uniform magnetic field $B$ is directed vertically upwards and 3 wires of equal length $L$, carrying equal current $I$ are lying in a horizontal plane such that the first one is along north, second one along north-east and the third one at $60^{\circ}$ north of east. Force exerted by magnetic field $B$ on them is

154064 Two magnets $A$ and $B$ having the same mass and length are suspended and made to oscillate freely with time periods $T_{A}$ and $T_{B}$. If the moment of inertia of $A$ is one fourth that of $B$, the ratio of $\mathbf{T}_{B}$ to $\mathbf{T}_{\mathrm{A}}$ is

154058 A 100 turn closely wound circular coil of radius $10 \mathrm{~cm}$ carries a current of $3.2 \mathrm{~A}$. The magnetic moment of the coil is, approximately,

154059 Two wires $A$ and $B$ have lengths of $40 \mathrm{~cm}$ and $30 \mathrm{~cm}$. $A$ is bent into a circle of radius $r$ and $B$ into an arc of radius $r$. A current $I_{1}$, is passed through $A$ and $I_{2}$ through $B$. To have the same magnetic induction at the centre, the ratio of $I_{1}: I_{2}$ is

154060 Uniform magnetic field $B$ is directed vertically upwards and 3 wires of equal length $L$, carrying equal current $I$ are lying in a horizontal plane such that the first one is along north, second one along north-east and the third one at $60^{\circ}$ north of east. Force exerted by magnetic field $B$ on them is

154064 Two magnets $A$ and $B$ having the same mass and length are suspended and made to oscillate freely with time periods $T_{A}$ and $T_{B}$. If the moment of inertia of $A$ is one fourth that of $B$, the ratio of $\mathbf{T}_{B}$ to $\mathbf{T}_{\mathrm{A}}$ is