153826 The couple acting on a magnet of length $10 \mathrm{~cm}$ placed in a uniform magnetic field of intensity $40 \mathrm{Na}^{-1} \mathrm{~m}^{-1}$ such that the axis of the magnet makes $45^{\circ}$ with the field direction is $\sqrt{2} / 10$ $\mathrm{Nm}$. The pole strength of the magnet (in $\mathrm{Wb}$ ) is

153827 A bar magnet of magnetic moment $\vec{M}$ is placed in a magnetic field of induction $\vec{B}$. The torque exerted on it is

153828 A bar magnet of pole strength $2 \mathrm{~A}-\mathrm{m}$ is kept in a magnetic field of induction $4 \times 10^{-5} \mathrm{Wbm}^{-2}$ such that the axis of the magnet makes an angle $30^{\circ}$ with the direction of the field. The couple acting on the magnet is found to be $80 \times 10^{-7} \mathrm{~N}$ $\mathrm{m}$. Then, the distance between the poles of the magnet is

153829 When two infinitely long parallel wires separated by a distance of $1 \mathrm{~m}$, each carry a current of $3 \mathrm{~A}$, the force in $\mathrm{Nm}^{-1}$ length experienced by each will be (given $\mu_{0}=4 \pi \times 10^{-}$ ${ }^{7} \mathrm{Hm}^{-1}$ SI units)

153826 The couple acting on a magnet of length $10 \mathrm{~cm}$ placed in a uniform magnetic field of intensity $40 \mathrm{Na}^{-1} \mathrm{~m}^{-1}$ such that the axis of the magnet makes $45^{\circ}$ with the field direction is $\sqrt{2} / 10$ $\mathrm{Nm}$. The pole strength of the magnet (in $\mathrm{Wb}$ ) is

153827 A bar magnet of magnetic moment $\vec{M}$ is placed in a magnetic field of induction $\vec{B}$. The torque exerted on it is

153828 A bar magnet of pole strength $2 \mathrm{~A}-\mathrm{m}$ is kept in a magnetic field of induction $4 \times 10^{-5} \mathrm{Wbm}^{-2}$ such that the axis of the magnet makes an angle $30^{\circ}$ with the direction of the field. The couple acting on the magnet is found to be $80 \times 10^{-7} \mathrm{~N}$ $\mathrm{m}$. Then, the distance between the poles of the magnet is

153829 When two infinitely long parallel wires separated by a distance of $1 \mathrm{~m}$, each carry a current of $3 \mathrm{~A}$, the force in $\mathrm{Nm}^{-1}$ length experienced by each will be (given $\mu_{0}=4 \pi \times 10^{-}$ ${ }^{7} \mathrm{Hm}^{-1}$ SI units)

153826 The couple acting on a magnet of length $10 \mathrm{~cm}$ placed in a uniform magnetic field of intensity $40 \mathrm{Na}^{-1} \mathrm{~m}^{-1}$ such that the axis of the magnet makes $45^{\circ}$ with the field direction is $\sqrt{2} / 10$ $\mathrm{Nm}$. The pole strength of the magnet (in $\mathrm{Wb}$ ) is

153827 A bar magnet of magnetic moment $\vec{M}$ is placed in a magnetic field of induction $\vec{B}$. The torque exerted on it is

153828 A bar magnet of pole strength $2 \mathrm{~A}-\mathrm{m}$ is kept in a magnetic field of induction $4 \times 10^{-5} \mathrm{Wbm}^{-2}$ such that the axis of the magnet makes an angle $30^{\circ}$ with the direction of the field. The couple acting on the magnet is found to be $80 \times 10^{-7} \mathrm{~N}$ $\mathrm{m}$. Then, the distance between the poles of the magnet is

153829 When two infinitely long parallel wires separated by a distance of $1 \mathrm{~m}$, each carry a current of $3 \mathrm{~A}$, the force in $\mathrm{Nm}^{-1}$ length experienced by each will be (given $\mu_{0}=4 \pi \times 10^{-}$ ${ }^{7} \mathrm{Hm}^{-1}$ SI units)

153826 The couple acting on a magnet of length $10 \mathrm{~cm}$ placed in a uniform magnetic field of intensity $40 \mathrm{Na}^{-1} \mathrm{~m}^{-1}$ such that the axis of the magnet makes $45^{\circ}$ with the field direction is $\sqrt{2} / 10$ $\mathrm{Nm}$. The pole strength of the magnet (in $\mathrm{Wb}$ ) is

153827 A bar magnet of magnetic moment $\vec{M}$ is placed in a magnetic field of induction $\vec{B}$. The torque exerted on it is

153828 A bar magnet of pole strength $2 \mathrm{~A}-\mathrm{m}$ is kept in a magnetic field of induction $4 \times 10^{-5} \mathrm{Wbm}^{-2}$ such that the axis of the magnet makes an angle $30^{\circ}$ with the direction of the field. The couple acting on the magnet is found to be $80 \times 10^{-7} \mathrm{~N}$ $\mathrm{m}$. Then, the distance between the poles of the magnet is

153829 When two infinitely long parallel wires separated by a distance of $1 \mathrm{~m}$, each carry a current of $3 \mathrm{~A}$, the force in $\mathrm{Nm}^{-1}$ length experienced by each will be (given $\mu_{0}=4 \pi \times 10^{-}$ ${ }^{7} \mathrm{Hm}^{-1}$ SI units)