Magnetic Force
PHXII04:MOVING CHARGES AND MAGNETISM

362746 Two long current carrying thin wires, both with current \(I\), are held by insulating threads of length \(L\) and are in equilibrium as shown in the figure, with threads making an angle \(\theta\) with the vertical. If wires have mass \(\lambda\) per unit length then the value of \(I\) is: ( \(g=\) gravitational acceleration)
supporting img

1 \(2 \sin \theta \sqrt{\dfrac{\pi \lambda g L}{\mu_{0} \cos \theta}}\)
2 \(2 \sqrt{\dfrac{\pi g L}{\mu_{0}} \tan \theta}\)
3 \(\sqrt{\dfrac{\pi \lambda g L}{\mu_{0}} \tan \theta}\)
4 \(\sin \theta \sqrt{\dfrac{\pi \lambda g L}{\mu_{0} \cos \theta}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

362747 A metallic rod of mass per unit length \(0.5\;kg\;{m^{ - 1}}\) is lying horizontally on a smooth inclined plane which makes an angle of \(30^{\circ}\) with the horizontal. The rod is not allowed to slide down by flowing a current through it when a magnetic field of induction 0.25\(T\) acting on it in the vertical direction. The current flowing in the rod to keep it stationary is

1 14.76\(A\)
2 11.32\(A\)
3 5.98\(A\)
4 7.14\(A\)
PHXII04:MOVING CHARGES AND MAGNETISM

362748 A uniform magnetic field of 1.5\(T\) exists in cylindrical region of radius 10\(cm\). Its direction parallel to the axis along east to west. A wire carrying current of 7\(A\) in the north east to south west direction passes through this rigion. The magnitude and direction of the force on the wire is

1 2.1\(N\) vertically upwards
2 2.1\(N\) vertically downwards
3 4.1\(N\) vertically upwards
4 4.1\(N\) vertically downwards
PHXII04:MOVING CHARGES AND MAGNETISM

362749 Given below two statements One is labelled as (\(A\)) and the other is labelled as Reason(\(R\)).
Assertion :
In an uniform magnetic field, speed and energy remains the same for a moving charged particle.
Reason :
Moving charged particle experiences magnetic force perpendicular to its direction of motion.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII04:MOVING CHARGES AND MAGNETISM

362746 Two long current carrying thin wires, both with current \(I\), are held by insulating threads of length \(L\) and are in equilibrium as shown in the figure, with threads making an angle \(\theta\) with the vertical. If wires have mass \(\lambda\) per unit length then the value of \(I\) is: ( \(g=\) gravitational acceleration)
supporting img

1 \(2 \sin \theta \sqrt{\dfrac{\pi \lambda g L}{\mu_{0} \cos \theta}}\)
2 \(2 \sqrt{\dfrac{\pi g L}{\mu_{0}} \tan \theta}\)
3 \(\sqrt{\dfrac{\pi \lambda g L}{\mu_{0}} \tan \theta}\)
4 \(\sin \theta \sqrt{\dfrac{\pi \lambda g L}{\mu_{0} \cos \theta}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

362747 A metallic rod of mass per unit length \(0.5\;kg\;{m^{ - 1}}\) is lying horizontally on a smooth inclined plane which makes an angle of \(30^{\circ}\) with the horizontal. The rod is not allowed to slide down by flowing a current through it when a magnetic field of induction 0.25\(T\) acting on it in the vertical direction. The current flowing in the rod to keep it stationary is

1 14.76\(A\)
2 11.32\(A\)
3 5.98\(A\)
4 7.14\(A\)
PHXII04:MOVING CHARGES AND MAGNETISM

362748 A uniform magnetic field of 1.5\(T\) exists in cylindrical region of radius 10\(cm\). Its direction parallel to the axis along east to west. A wire carrying current of 7\(A\) in the north east to south west direction passes through this rigion. The magnitude and direction of the force on the wire is

1 2.1\(N\) vertically upwards
2 2.1\(N\) vertically downwards
3 4.1\(N\) vertically upwards
4 4.1\(N\) vertically downwards
PHXII04:MOVING CHARGES AND MAGNETISM

362749 Given below two statements One is labelled as (\(A\)) and the other is labelled as Reason(\(R\)).
Assertion :
In an uniform magnetic field, speed and energy remains the same for a moving charged particle.
Reason :
Moving charged particle experiences magnetic force perpendicular to its direction of motion.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXII04:MOVING CHARGES AND MAGNETISM

362746 Two long current carrying thin wires, both with current \(I\), are held by insulating threads of length \(L\) and are in equilibrium as shown in the figure, with threads making an angle \(\theta\) with the vertical. If wires have mass \(\lambda\) per unit length then the value of \(I\) is: ( \(g=\) gravitational acceleration)
supporting img

1 \(2 \sin \theta \sqrt{\dfrac{\pi \lambda g L}{\mu_{0} \cos \theta}}\)
2 \(2 \sqrt{\dfrac{\pi g L}{\mu_{0}} \tan \theta}\)
3 \(\sqrt{\dfrac{\pi \lambda g L}{\mu_{0}} \tan \theta}\)
4 \(\sin \theta \sqrt{\dfrac{\pi \lambda g L}{\mu_{0} \cos \theta}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

362747 A metallic rod of mass per unit length \(0.5\;kg\;{m^{ - 1}}\) is lying horizontally on a smooth inclined plane which makes an angle of \(30^{\circ}\) with the horizontal. The rod is not allowed to slide down by flowing a current through it when a magnetic field of induction 0.25\(T\) acting on it in the vertical direction. The current flowing in the rod to keep it stationary is

1 14.76\(A\)
2 11.32\(A\)
3 5.98\(A\)
4 7.14\(A\)
PHXII04:MOVING CHARGES AND MAGNETISM

362748 A uniform magnetic field of 1.5\(T\) exists in cylindrical region of radius 10\(cm\). Its direction parallel to the axis along east to west. A wire carrying current of 7\(A\) in the north east to south west direction passes through this rigion. The magnitude and direction of the force on the wire is

1 2.1\(N\) vertically upwards
2 2.1\(N\) vertically downwards
3 4.1\(N\) vertically upwards
4 4.1\(N\) vertically downwards
PHXII04:MOVING CHARGES AND MAGNETISM

362749 Given below two statements One is labelled as (\(A\)) and the other is labelled as Reason(\(R\)).
Assertion :
In an uniform magnetic field, speed and energy remains the same for a moving charged particle.
Reason :
Moving charged particle experiences magnetic force perpendicular to its direction of motion.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII04:MOVING CHARGES AND MAGNETISM

362746 Two long current carrying thin wires, both with current \(I\), are held by insulating threads of length \(L\) and are in equilibrium as shown in the figure, with threads making an angle \(\theta\) with the vertical. If wires have mass \(\lambda\) per unit length then the value of \(I\) is: ( \(g=\) gravitational acceleration)
supporting img

1 \(2 \sin \theta \sqrt{\dfrac{\pi \lambda g L}{\mu_{0} \cos \theta}}\)
2 \(2 \sqrt{\dfrac{\pi g L}{\mu_{0}} \tan \theta}\)
3 \(\sqrt{\dfrac{\pi \lambda g L}{\mu_{0}} \tan \theta}\)
4 \(\sin \theta \sqrt{\dfrac{\pi \lambda g L}{\mu_{0} \cos \theta}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

362747 A metallic rod of mass per unit length \(0.5\;kg\;{m^{ - 1}}\) is lying horizontally on a smooth inclined plane which makes an angle of \(30^{\circ}\) with the horizontal. The rod is not allowed to slide down by flowing a current through it when a magnetic field of induction 0.25\(T\) acting on it in the vertical direction. The current flowing in the rod to keep it stationary is

1 14.76\(A\)
2 11.32\(A\)
3 5.98\(A\)
4 7.14\(A\)
PHXII04:MOVING CHARGES AND MAGNETISM

362748 A uniform magnetic field of 1.5\(T\) exists in cylindrical region of radius 10\(cm\). Its direction parallel to the axis along east to west. A wire carrying current of 7\(A\) in the north east to south west direction passes through this rigion. The magnitude and direction of the force on the wire is

1 2.1\(N\) vertically upwards
2 2.1\(N\) vertically downwards
3 4.1\(N\) vertically upwards
4 4.1\(N\) vertically downwards
PHXII04:MOVING CHARGES AND MAGNETISM

362749 Given below two statements One is labelled as (\(A\)) and the other is labelled as Reason(\(R\)).
Assertion :
In an uniform magnetic field, speed and energy remains the same for a moving charged particle.
Reason :
Moving charged particle experiences magnetic force perpendicular to its direction of motion.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.