04. Force and Torque on Current Carrying Conductor
Moving Charges & Magnetism

153773 Find force per unit length at $P$.

1 $10^{-4} \mathrm{~m}$
2 $10^{-4} \mathrm{~N} / \mathrm{m}$
3 $3 \times 10^{-4} \mathrm{~N} / \mathrm{m}$
4 $0.3 \mathrm{~N} / \mathrm{m}$
Moving Charges & Magnetism

153774 If two protons are moving with speed $v=$ $4.5 \times 10^{5} \mathrm{~m} / \mathrm{s}$ parallel to each other then find the ratio of electrostatic and magnetic force between them.

1 $4.4 \times 10^{5}$
2 $2.2 \times 10^{5}$
3 $3.3 \times 10^{5}$
4 $1.1 \times 10^{5}$
Moving Charges & Magnetism

153775 A circular coil of radius $10 \mathrm{~cm}$ with 100 turns carrying a current of $0.5 \mathrm{~A}$ lies in a magnetic field of $2 \mathrm{~T}$ such that the normal drawn to the plane of the coil makes an angle $\theta$ with the direction of the field. Work done in rotating the coil to change the angle $\theta$ from $0^{\circ}$ to $180^{\circ}$ is

1 $\pi \mathrm{J}$
2 $2 \pi \mathrm{J}$
3 $4 \pi \mathrm{J}$
4 $8 \pi \mathrm{J}$
Moving Charges & Magnetism

153776 A wire of length $44 \mathrm{~cm}$ carrying a current of 2 $A$ is bent and the two ends are joined. This shape is placed in a uniform magnetic field of $50 \mathrm{mT}$. If the magnetic field is in North-South direction, then the maximum torque acting on the shape is

1 $1.54 \times 10^{-3} \mathrm{Nm}$
2 $0.77 \times 10^{-3} \mathrm{Nm}$
3 $3.08 \times 10^{-3} \mathrm{Nm}$
4 Zero
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Moving Charges & Magnetism

153773 Find force per unit length at $P$.

1 $10^{-4} \mathrm{~m}$
2 $10^{-4} \mathrm{~N} / \mathrm{m}$
3 $3 \times 10^{-4} \mathrm{~N} / \mathrm{m}$
4 $0.3 \mathrm{~N} / \mathrm{m}$
Moving Charges & Magnetism

153774 If two protons are moving with speed $v=$ $4.5 \times 10^{5} \mathrm{~m} / \mathrm{s}$ parallel to each other then find the ratio of electrostatic and magnetic force between them.

1 $4.4 \times 10^{5}$
2 $2.2 \times 10^{5}$
3 $3.3 \times 10^{5}$
4 $1.1 \times 10^{5}$
Moving Charges & Magnetism

153775 A circular coil of radius $10 \mathrm{~cm}$ with 100 turns carrying a current of $0.5 \mathrm{~A}$ lies in a magnetic field of $2 \mathrm{~T}$ such that the normal drawn to the plane of the coil makes an angle $\theta$ with the direction of the field. Work done in rotating the coil to change the angle $\theta$ from $0^{\circ}$ to $180^{\circ}$ is

1 $\pi \mathrm{J}$
2 $2 \pi \mathrm{J}$
3 $4 \pi \mathrm{J}$
4 $8 \pi \mathrm{J}$
Moving Charges & Magnetism

153776 A wire of length $44 \mathrm{~cm}$ carrying a current of 2 $A$ is bent and the two ends are joined. This shape is placed in a uniform magnetic field of $50 \mathrm{mT}$. If the magnetic field is in North-South direction, then the maximum torque acting on the shape is

1 $1.54 \times 10^{-3} \mathrm{Nm}$
2 $0.77 \times 10^{-3} \mathrm{Nm}$
3 $3.08 \times 10^{-3} \mathrm{Nm}$
4 Zero
Moving Charges & Magnetism

153773 Find force per unit length at $P$.

1 $10^{-4} \mathrm{~m}$
2 $10^{-4} \mathrm{~N} / \mathrm{m}$
3 $3 \times 10^{-4} \mathrm{~N} / \mathrm{m}$
4 $0.3 \mathrm{~N} / \mathrm{m}$
Moving Charges & Magnetism

153774 If two protons are moving with speed $v=$ $4.5 \times 10^{5} \mathrm{~m} / \mathrm{s}$ parallel to each other then find the ratio of electrostatic and magnetic force between them.

1 $4.4 \times 10^{5}$
2 $2.2 \times 10^{5}$
3 $3.3 \times 10^{5}$
4 $1.1 \times 10^{5}$
Moving Charges & Magnetism

153775 A circular coil of radius $10 \mathrm{~cm}$ with 100 turns carrying a current of $0.5 \mathrm{~A}$ lies in a magnetic field of $2 \mathrm{~T}$ such that the normal drawn to the plane of the coil makes an angle $\theta$ with the direction of the field. Work done in rotating the coil to change the angle $\theta$ from $0^{\circ}$ to $180^{\circ}$ is

1 $\pi \mathrm{J}$
2 $2 \pi \mathrm{J}$
3 $4 \pi \mathrm{J}$
4 $8 \pi \mathrm{J}$
Moving Charges & Magnetism

153776 A wire of length $44 \mathrm{~cm}$ carrying a current of 2 $A$ is bent and the two ends are joined. This shape is placed in a uniform magnetic field of $50 \mathrm{mT}$. If the magnetic field is in North-South direction, then the maximum torque acting on the shape is

1 $1.54 \times 10^{-3} \mathrm{Nm}$
2 $0.77 \times 10^{-3} \mathrm{Nm}$
3 $3.08 \times 10^{-3} \mathrm{Nm}$
4 Zero
Moving Charges & Magnetism

153773 Find force per unit length at $P$.

1 $10^{-4} \mathrm{~m}$
2 $10^{-4} \mathrm{~N} / \mathrm{m}$
3 $3 \times 10^{-4} \mathrm{~N} / \mathrm{m}$
4 $0.3 \mathrm{~N} / \mathrm{m}$
Moving Charges & Magnetism

153774 If two protons are moving with speed $v=$ $4.5 \times 10^{5} \mathrm{~m} / \mathrm{s}$ parallel to each other then find the ratio of electrostatic and magnetic force between them.

1 $4.4 \times 10^{5}$
2 $2.2 \times 10^{5}$
3 $3.3 \times 10^{5}$
4 $1.1 \times 10^{5}$
Moving Charges & Magnetism

153775 A circular coil of radius $10 \mathrm{~cm}$ with 100 turns carrying a current of $0.5 \mathrm{~A}$ lies in a magnetic field of $2 \mathrm{~T}$ such that the normal drawn to the plane of the coil makes an angle $\theta$ with the direction of the field. Work done in rotating the coil to change the angle $\theta$ from $0^{\circ}$ to $180^{\circ}$ is

1 $\pi \mathrm{J}$
2 $2 \pi \mathrm{J}$
3 $4 \pi \mathrm{J}$
4 $8 \pi \mathrm{J}$
Moving Charges & Magnetism

153776 A wire of length $44 \mathrm{~cm}$ carrying a current of 2 $A$ is bent and the two ends are joined. This shape is placed in a uniform magnetic field of $50 \mathrm{mT}$. If the magnetic field is in North-South direction, then the maximum torque acting on the shape is

1 $1.54 \times 10^{-3} \mathrm{Nm}$
2 $0.77 \times 10^{-3} \mathrm{Nm}$
3 $3.08 \times 10^{-3} \mathrm{Nm}$
4 Zero