Magnetic Force
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXII04:MOVING CHARGES AND MAGNETISM

362763 A closed loop \(PQRS\) carrying a current is placed in a uniform magnetic field. If the magnetic forces on segment \(PS\), \(SR\) and \(RQ\) are \(F_{1}, F_{2}\) and \(F_{3}\) respectively and are in the plane of the paper and along the directions as shown, the force on the segment \(QP\) is
supporting img

1 \(F_{3}-F_{1}+F_{2}\)
2 \(\sqrt{\left(F_{3}-F_{1}\right)^{2}+F_{2}^{2}}\)
3 \(F_{3}+F_{1}-F_{2}\)
4 \(\sqrt{\left(F_{3}-F_{1}\right)^{2}-F_{2}^{2}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

362764 A charge \(q\) is moved in magnetic field by distance \(dl\). Find the work done by magnetic field

1 Zero
2 Infinity
3 1
4 -1
PHXII04:MOVING CHARGES AND MAGNETISM

362765 A straight wire of length 50\(cm\) carrying a current of 2.5\(A\) is suspended in mid-air by a uniform magnetic field of 0.5\(T\) (as shown in figure). The mass of the wire is \(\left( {g = 10\;m\;{s^{ - 2}}} \right)\)
supporting img

1 100\(gm\)
2 125\(gm\)
3 62.5\(gm\)
4 250\(gm\)
PHXII04:MOVING CHARGES AND MAGNETISM

362766 A rectangular coil \(ABCD\) is hung from one side of a balance (as shown in fig.) A \(500\;g\) mass is added to the other arm to balance the weight of the coil. A current of \(4.9\;A\) is passed through the coil and a constant magnetic field of \(0.6\;T\) acting inward (in \(x - z\) plane) is switched on such that only arm \(CD\) of length \(1.5\;cm\) lies in the field. The additional mass \(m\) must be added to regain the balance is \(N \times {10^{ - 2}}\;kg\). Find \(N\).
supporting img

1 0.27
2 0.45
3 0.16
4 0.85
PHXII04:MOVING CHARGES AND MAGNETISM

362763 A closed loop \(PQRS\) carrying a current is placed in a uniform magnetic field. If the magnetic forces on segment \(PS\), \(SR\) and \(RQ\) are \(F_{1}, F_{2}\) and \(F_{3}\) respectively and are in the plane of the paper and along the directions as shown, the force on the segment \(QP\) is
supporting img

1 \(F_{3}-F_{1}+F_{2}\)
2 \(\sqrt{\left(F_{3}-F_{1}\right)^{2}+F_{2}^{2}}\)
3 \(F_{3}+F_{1}-F_{2}\)
4 \(\sqrt{\left(F_{3}-F_{1}\right)^{2}-F_{2}^{2}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

362764 A charge \(q\) is moved in magnetic field by distance \(dl\). Find the work done by magnetic field

1 Zero
2 Infinity
3 1
4 -1
PHXII04:MOVING CHARGES AND MAGNETISM

362765 A straight wire of length 50\(cm\) carrying a current of 2.5\(A\) is suspended in mid-air by a uniform magnetic field of 0.5\(T\) (as shown in figure). The mass of the wire is \(\left( {g = 10\;m\;{s^{ - 2}}} \right)\)
supporting img

1 100\(gm\)
2 125\(gm\)
3 62.5\(gm\)
4 250\(gm\)
PHXII04:MOVING CHARGES AND MAGNETISM

362766 A rectangular coil \(ABCD\) is hung from one side of a balance (as shown in fig.) A \(500\;g\) mass is added to the other arm to balance the weight of the coil. A current of \(4.9\;A\) is passed through the coil and a constant magnetic field of \(0.6\;T\) acting inward (in \(x - z\) plane) is switched on such that only arm \(CD\) of length \(1.5\;cm\) lies in the field. The additional mass \(m\) must be added to regain the balance is \(N \times {10^{ - 2}}\;kg\). Find \(N\).
supporting img

1 0.27
2 0.45
3 0.16
4 0.85
PHXII04:MOVING CHARGES AND MAGNETISM

362763 A closed loop \(PQRS\) carrying a current is placed in a uniform magnetic field. If the magnetic forces on segment \(PS\), \(SR\) and \(RQ\) are \(F_{1}, F_{2}\) and \(F_{3}\) respectively and are in the plane of the paper and along the directions as shown, the force on the segment \(QP\) is
supporting img

1 \(F_{3}-F_{1}+F_{2}\)
2 \(\sqrt{\left(F_{3}-F_{1}\right)^{2}+F_{2}^{2}}\)
3 \(F_{3}+F_{1}-F_{2}\)
4 \(\sqrt{\left(F_{3}-F_{1}\right)^{2}-F_{2}^{2}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

362764 A charge \(q\) is moved in magnetic field by distance \(dl\). Find the work done by magnetic field

1 Zero
2 Infinity
3 1
4 -1
PHXII04:MOVING CHARGES AND MAGNETISM

362765 A straight wire of length 50\(cm\) carrying a current of 2.5\(A\) is suspended in mid-air by a uniform magnetic field of 0.5\(T\) (as shown in figure). The mass of the wire is \(\left( {g = 10\;m\;{s^{ - 2}}} \right)\)
supporting img

1 100\(gm\)
2 125\(gm\)
3 62.5\(gm\)
4 250\(gm\)
PHXII04:MOVING CHARGES AND MAGNETISM

362766 A rectangular coil \(ABCD\) is hung from one side of a balance (as shown in fig.) A \(500\;g\) mass is added to the other arm to balance the weight of the coil. A current of \(4.9\;A\) is passed through the coil and a constant magnetic field of \(0.6\;T\) acting inward (in \(x - z\) plane) is switched on such that only arm \(CD\) of length \(1.5\;cm\) lies in the field. The additional mass \(m\) must be added to regain the balance is \(N \times {10^{ - 2}}\;kg\). Find \(N\).
supporting img

1 0.27
2 0.45
3 0.16
4 0.85
PHXII04:MOVING CHARGES AND MAGNETISM

362763 A closed loop \(PQRS\) carrying a current is placed in a uniform magnetic field. If the magnetic forces on segment \(PS\), \(SR\) and \(RQ\) are \(F_{1}, F_{2}\) and \(F_{3}\) respectively and are in the plane of the paper and along the directions as shown, the force on the segment \(QP\) is
supporting img

1 \(F_{3}-F_{1}+F_{2}\)
2 \(\sqrt{\left(F_{3}-F_{1}\right)^{2}+F_{2}^{2}}\)
3 \(F_{3}+F_{1}-F_{2}\)
4 \(\sqrt{\left(F_{3}-F_{1}\right)^{2}-F_{2}^{2}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

362764 A charge \(q\) is moved in magnetic field by distance \(dl\). Find the work done by magnetic field

1 Zero
2 Infinity
3 1
4 -1
PHXII04:MOVING CHARGES AND MAGNETISM

362765 A straight wire of length 50\(cm\) carrying a current of 2.5\(A\) is suspended in mid-air by a uniform magnetic field of 0.5\(T\) (as shown in figure). The mass of the wire is \(\left( {g = 10\;m\;{s^{ - 2}}} \right)\)
supporting img

1 100\(gm\)
2 125\(gm\)
3 62.5\(gm\)
4 250\(gm\)
PHXII04:MOVING CHARGES AND MAGNETISM

362766 A rectangular coil \(ABCD\) is hung from one side of a balance (as shown in fig.) A \(500\;g\) mass is added to the other arm to balance the weight of the coil. A current of \(4.9\;A\) is passed through the coil and a constant magnetic field of \(0.6\;T\) acting inward (in \(x - z\) plane) is switched on such that only arm \(CD\) of length \(1.5\;cm\) lies in the field. The additional mass \(m\) must be added to regain the balance is \(N \times {10^{ - 2}}\;kg\). Find \(N\).
supporting img

1 0.27
2 0.45
3 0.16
4 0.85