Dipole in a Magnetic Field
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PHXII05:MAGNETISM and MATTER

360413 A magnet of moment \({2 {~A} {~m}^{2}}\) is placed in a uniform magnetic field of \({5 {~Wb} / {m}^{2}}\). If the magnet experiences a torque of 5 \(N\,m\) , then the angle between the direction of magnetic field and magnet is

1 \({\dfrac{\pi}{6}}\)
2 \({\dfrac{\pi}{4}}\)
3 \({\dfrac{\pi}{3}}\)
4 \({\dfrac{\pi}{2}}\)
PHXII05:MAGNETISM and MATTER

360414 The effect due to uniform magnetic field on a freely suspended magnetic needle is as follows

1 both torque and net force are present
2 torque is present but no net force
3 both torque and net force are absent
4 net force is present but not torque
PHXII05:MAGNETISM and MATTER

360415 A bar magnet of length 10\(cm\) and having the pole strength equal to \({10^{ - 3}}\;A.m\) is kept in a magnetic field having magnetic induction \((B)\) equal to \(4 \pi \times 10^{-3}\) tesla. It makes an angle of \(30^{\circ}\) with the direction of magnetic induction. The value of the torque acting on the magnet is

1 \(2\pi \times {10^{ - 7}}Nm\)
2 \(0.5 \times {10^2}Nm\)
3 \(0.5Nm\)
4 \(2\pi \times {10^{ - 5}}0.5Nm\)
PHXII05:MAGNETISM and MATTER

360416 A torque of \({10^{ - 5}}\;N - m\) is required to hold a magnet at \(90^{\circ}\) with the horizontal component of the earth's magnetic field. The torque required to hold it at \(30^{\circ}\) will be

1 \(5 \times {10^{ - 6}}\;N - m\)
2 \(\frac{1}{2} \times {10^{ - 5}}\,\,\,\,\,\,\,\,N - m\)
3 \(5\sqrt 3 \times {10^{ - 6}}\,\,\,\,\,\,N - m\)
4 Data is insufficient
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PHXII05:MAGNETISM and MATTER

360413 A magnet of moment \({2 {~A} {~m}^{2}}\) is placed in a uniform magnetic field of \({5 {~Wb} / {m}^{2}}\). If the magnet experiences a torque of 5 \(N\,m\) , then the angle between the direction of magnetic field and magnet is

1 \({\dfrac{\pi}{6}}\)
2 \({\dfrac{\pi}{4}}\)
3 \({\dfrac{\pi}{3}}\)
4 \({\dfrac{\pi}{2}}\)
PHXII05:MAGNETISM and MATTER

360414 The effect due to uniform magnetic field on a freely suspended magnetic needle is as follows

1 both torque and net force are present
2 torque is present but no net force
3 both torque and net force are absent
4 net force is present but not torque
PHXII05:MAGNETISM and MATTER

360415 A bar magnet of length 10\(cm\) and having the pole strength equal to \({10^{ - 3}}\;A.m\) is kept in a magnetic field having magnetic induction \((B)\) equal to \(4 \pi \times 10^{-3}\) tesla. It makes an angle of \(30^{\circ}\) with the direction of magnetic induction. The value of the torque acting on the magnet is

1 \(2\pi \times {10^{ - 7}}Nm\)
2 \(0.5 \times {10^2}Nm\)
3 \(0.5Nm\)
4 \(2\pi \times {10^{ - 5}}0.5Nm\)
PHXII05:MAGNETISM and MATTER

360416 A torque of \({10^{ - 5}}\;N - m\) is required to hold a magnet at \(90^{\circ}\) with the horizontal component of the earth's magnetic field. The torque required to hold it at \(30^{\circ}\) will be

1 \(5 \times {10^{ - 6}}\;N - m\)
2 \(\frac{1}{2} \times {10^{ - 5}}\,\,\,\,\,\,\,\,N - m\)
3 \(5\sqrt 3 \times {10^{ - 6}}\,\,\,\,\,\,N - m\)
4 Data is insufficient
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PHXII05:MAGNETISM and MATTER

360413 A magnet of moment \({2 {~A} {~m}^{2}}\) is placed in a uniform magnetic field of \({5 {~Wb} / {m}^{2}}\). If the magnet experiences a torque of 5 \(N\,m\) , then the angle between the direction of magnetic field and magnet is

1 \({\dfrac{\pi}{6}}\)
2 \({\dfrac{\pi}{4}}\)
3 \({\dfrac{\pi}{3}}\)
4 \({\dfrac{\pi}{2}}\)
PHXII05:MAGNETISM and MATTER

360414 The effect due to uniform magnetic field on a freely suspended magnetic needle is as follows

1 both torque and net force are present
2 torque is present but no net force
3 both torque and net force are absent
4 net force is present but not torque
PHXII05:MAGNETISM and MATTER

360415 A bar magnet of length 10\(cm\) and having the pole strength equal to \({10^{ - 3}}\;A.m\) is kept in a magnetic field having magnetic induction \((B)\) equal to \(4 \pi \times 10^{-3}\) tesla. It makes an angle of \(30^{\circ}\) with the direction of magnetic induction. The value of the torque acting on the magnet is

1 \(2\pi \times {10^{ - 7}}Nm\)
2 \(0.5 \times {10^2}Nm\)
3 \(0.5Nm\)
4 \(2\pi \times {10^{ - 5}}0.5Nm\)
PHXII05:MAGNETISM and MATTER

360416 A torque of \({10^{ - 5}}\;N - m\) is required to hold a magnet at \(90^{\circ}\) with the horizontal component of the earth's magnetic field. The torque required to hold it at \(30^{\circ}\) will be

1 \(5 \times {10^{ - 6}}\;N - m\)
2 \(\frac{1}{2} \times {10^{ - 5}}\,\,\,\,\,\,\,\,N - m\)
3 \(5\sqrt 3 \times {10^{ - 6}}\,\,\,\,\,\,N - m\)
4 Data is insufficient
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PHXII05:MAGNETISM and MATTER

360413 A magnet of moment \({2 {~A} {~m}^{2}}\) is placed in a uniform magnetic field of \({5 {~Wb} / {m}^{2}}\). If the magnet experiences a torque of 5 \(N\,m\) , then the angle between the direction of magnetic field and magnet is

1 \({\dfrac{\pi}{6}}\)
2 \({\dfrac{\pi}{4}}\)
3 \({\dfrac{\pi}{3}}\)
4 \({\dfrac{\pi}{2}}\)
PHXII05:MAGNETISM and MATTER

360414 The effect due to uniform magnetic field on a freely suspended magnetic needle is as follows

1 both torque and net force are present
2 torque is present but no net force
3 both torque and net force are absent
4 net force is present but not torque
PHXII05:MAGNETISM and MATTER

360415 A bar magnet of length 10\(cm\) and having the pole strength equal to \({10^{ - 3}}\;A.m\) is kept in a magnetic field having magnetic induction \((B)\) equal to \(4 \pi \times 10^{-3}\) tesla. It makes an angle of \(30^{\circ}\) with the direction of magnetic induction. The value of the torque acting on the magnet is

1 \(2\pi \times {10^{ - 7}}Nm\)
2 \(0.5 \times {10^2}Nm\)
3 \(0.5Nm\)
4 \(2\pi \times {10^{ - 5}}0.5Nm\)
PHXII05:MAGNETISM and MATTER

360416 A torque of \({10^{ - 5}}\;N - m\) is required to hold a magnet at \(90^{\circ}\) with the horizontal component of the earth's magnetic field. The torque required to hold it at \(30^{\circ}\) will be

1 \(5 \times {10^{ - 6}}\;N - m\)
2 \(\frac{1}{2} \times {10^{ - 5}}\,\,\,\,\,\,\,\,N - m\)
3 \(5\sqrt 3 \times {10^{ - 6}}\,\,\,\,\,\,N - m\)
4 Data is insufficient
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