02. Motion of Charge Particle in Magnetic Field
Moving Charges & Magnetism

153539 A particle with charge $1.6 \times 10^{-5} \mathrm{C}$ is moving with a velocity of magnitude $3 \mathrm{~m} / \mathrm{s}$ in uniform magnetic field of $2 \mathrm{~T}$. The direction of velocity remains perpendicular to the direction of magnetic field. What is the magnitude of net force on the particle?

1 $4.6 \times 10^{-5} \mathrm{~N}$
2 $9.6 \times 10^{-5} \mathrm{~N}$
3 $5.6 \times 10^{-5} \mathrm{~N}$
4 $12.2 \times 10^{-5} \mathrm{~N}$
Moving Charges & Magnetism

153540 A proton moving in perpendicular magnetic field possesses energy ' $E$ '. The magnetic field is increased four times. But the proton is constrained to move in the path of same radius. The kinetic energy will increase

1 2 times
2 16 times
3 8 times
4 4 times
Moving Charges & Magnetism

153541 The work done by an uniform magnetic field, on a moving charge is

1 zero because $\overrightarrow{\mathrm{F}}$ acts parallel to $\overrightarrow{\mathrm{V}}$
2 positive because $\overrightarrow{\mathrm{F}}$ acts perpendicular to $\overrightarrow{\mathrm{V}}$
3 zero because $\vec{F}$ acts perpendicular to $\vec{V}$
4 negative because $\overrightarrow{\mathrm{F}}$ acts parallel to $\vec{v}$
Moving Charges & Magnetism

153542 Assertion: A charge particle is released from rest in magnetic field then it will move in circular path.
Reason: Work done by magnetic field is non zero.

1 If both assertion and reason are true and reason is the correct explanation of assertion.
2 If both assertion and reason are true but reason is not the correct explanation of assertion.
3 If assertion is true but reason is false.
4 If both assertion and reason are false.
Moving Charges & Magnetism

153544 The magnetic force acting on a charged particle of charge $-2 \mu \mathrm{C}$ in a magnetic field of 2 $T$ acting in $y$ direction, when the particle velocity is $(2 \hat{\mathbf{i}}+3 \hat{\mathbf{j}}) \times 10^{6} \mathrm{~m} \mathrm{~s}^{-1}$, is

1 $4 \mathrm{~N}$ in $\mathrm{z}$ - direction
2 $8 \mathrm{~N}$ in $\mathrm{y}$ - direction
3 $8 \mathrm{~N}$ in $\mathrm{x}$ - direction
4 $8 \mathrm{~N}$ in $\mathrm{z}$ - direction
Moving Charges & Magnetism

153539 A particle with charge $1.6 \times 10^{-5} \mathrm{C}$ is moving with a velocity of magnitude $3 \mathrm{~m} / \mathrm{s}$ in uniform magnetic field of $2 \mathrm{~T}$. The direction of velocity remains perpendicular to the direction of magnetic field. What is the magnitude of net force on the particle?

1 $4.6 \times 10^{-5} \mathrm{~N}$
2 $9.6 \times 10^{-5} \mathrm{~N}$
3 $5.6 \times 10^{-5} \mathrm{~N}$
4 $12.2 \times 10^{-5} \mathrm{~N}$
Moving Charges & Magnetism

153540 A proton moving in perpendicular magnetic field possesses energy ' $E$ '. The magnetic field is increased four times. But the proton is constrained to move in the path of same radius. The kinetic energy will increase

1 2 times
2 16 times
3 8 times
4 4 times
Moving Charges & Magnetism

153541 The work done by an uniform magnetic field, on a moving charge is

1 zero because $\overrightarrow{\mathrm{F}}$ acts parallel to $\overrightarrow{\mathrm{V}}$
2 positive because $\overrightarrow{\mathrm{F}}$ acts perpendicular to $\overrightarrow{\mathrm{V}}$
3 zero because $\vec{F}$ acts perpendicular to $\vec{V}$
4 negative because $\overrightarrow{\mathrm{F}}$ acts parallel to $\vec{v}$
Moving Charges & Magnetism

153542 Assertion: A charge particle is released from rest in magnetic field then it will move in circular path.
Reason: Work done by magnetic field is non zero.

1 If both assertion and reason are true and reason is the correct explanation of assertion.
2 If both assertion and reason are true but reason is not the correct explanation of assertion.
3 If assertion is true but reason is false.
4 If both assertion and reason are false.
Moving Charges & Magnetism

153544 The magnetic force acting on a charged particle of charge $-2 \mu \mathrm{C}$ in a magnetic field of 2 $T$ acting in $y$ direction, when the particle velocity is $(2 \hat{\mathbf{i}}+3 \hat{\mathbf{j}}) \times 10^{6} \mathrm{~m} \mathrm{~s}^{-1}$, is

1 $4 \mathrm{~N}$ in $\mathrm{z}$ - direction
2 $8 \mathrm{~N}$ in $\mathrm{y}$ - direction
3 $8 \mathrm{~N}$ in $\mathrm{x}$ - direction
4 $8 \mathrm{~N}$ in $\mathrm{z}$ - direction
Moving Charges & Magnetism

153539 A particle with charge $1.6 \times 10^{-5} \mathrm{C}$ is moving with a velocity of magnitude $3 \mathrm{~m} / \mathrm{s}$ in uniform magnetic field of $2 \mathrm{~T}$. The direction of velocity remains perpendicular to the direction of magnetic field. What is the magnitude of net force on the particle?

1 $4.6 \times 10^{-5} \mathrm{~N}$
2 $9.6 \times 10^{-5} \mathrm{~N}$
3 $5.6 \times 10^{-5} \mathrm{~N}$
4 $12.2 \times 10^{-5} \mathrm{~N}$
Moving Charges & Magnetism

153540 A proton moving in perpendicular magnetic field possesses energy ' $E$ '. The magnetic field is increased four times. But the proton is constrained to move in the path of same radius. The kinetic energy will increase

1 2 times
2 16 times
3 8 times
4 4 times
Moving Charges & Magnetism

153541 The work done by an uniform magnetic field, on a moving charge is

1 zero because $\overrightarrow{\mathrm{F}}$ acts parallel to $\overrightarrow{\mathrm{V}}$
2 positive because $\overrightarrow{\mathrm{F}}$ acts perpendicular to $\overrightarrow{\mathrm{V}}$
3 zero because $\vec{F}$ acts perpendicular to $\vec{V}$
4 negative because $\overrightarrow{\mathrm{F}}$ acts parallel to $\vec{v}$
Moving Charges & Magnetism

153542 Assertion: A charge particle is released from rest in magnetic field then it will move in circular path.
Reason: Work done by magnetic field is non zero.

1 If both assertion and reason are true and reason is the correct explanation of assertion.
2 If both assertion and reason are true but reason is not the correct explanation of assertion.
3 If assertion is true but reason is false.
4 If both assertion and reason are false.
Moving Charges & Magnetism

153544 The magnetic force acting on a charged particle of charge $-2 \mu \mathrm{C}$ in a magnetic field of 2 $T$ acting in $y$ direction, when the particle velocity is $(2 \hat{\mathbf{i}}+3 \hat{\mathbf{j}}) \times 10^{6} \mathrm{~m} \mathrm{~s}^{-1}$, is

1 $4 \mathrm{~N}$ in $\mathrm{z}$ - direction
2 $8 \mathrm{~N}$ in $\mathrm{y}$ - direction
3 $8 \mathrm{~N}$ in $\mathrm{x}$ - direction
4 $8 \mathrm{~N}$ in $\mathrm{z}$ - direction
Moving Charges & Magnetism

153539 A particle with charge $1.6 \times 10^{-5} \mathrm{C}$ is moving with a velocity of magnitude $3 \mathrm{~m} / \mathrm{s}$ in uniform magnetic field of $2 \mathrm{~T}$. The direction of velocity remains perpendicular to the direction of magnetic field. What is the magnitude of net force on the particle?

1 $4.6 \times 10^{-5} \mathrm{~N}$
2 $9.6 \times 10^{-5} \mathrm{~N}$
3 $5.6 \times 10^{-5} \mathrm{~N}$
4 $12.2 \times 10^{-5} \mathrm{~N}$
Moving Charges & Magnetism

153540 A proton moving in perpendicular magnetic field possesses energy ' $E$ '. The magnetic field is increased four times. But the proton is constrained to move in the path of same radius. The kinetic energy will increase

1 2 times
2 16 times
3 8 times
4 4 times
Moving Charges & Magnetism

153541 The work done by an uniform magnetic field, on a moving charge is

1 zero because $\overrightarrow{\mathrm{F}}$ acts parallel to $\overrightarrow{\mathrm{V}}$
2 positive because $\overrightarrow{\mathrm{F}}$ acts perpendicular to $\overrightarrow{\mathrm{V}}$
3 zero because $\vec{F}$ acts perpendicular to $\vec{V}$
4 negative because $\overrightarrow{\mathrm{F}}$ acts parallel to $\vec{v}$
Moving Charges & Magnetism

153542 Assertion: A charge particle is released from rest in magnetic field then it will move in circular path.
Reason: Work done by magnetic field is non zero.

1 If both assertion and reason are true and reason is the correct explanation of assertion.
2 If both assertion and reason are true but reason is not the correct explanation of assertion.
3 If assertion is true but reason is false.
4 If both assertion and reason are false.
Moving Charges & Magnetism

153544 The magnetic force acting on a charged particle of charge $-2 \mu \mathrm{C}$ in a magnetic field of 2 $T$ acting in $y$ direction, when the particle velocity is $(2 \hat{\mathbf{i}}+3 \hat{\mathbf{j}}) \times 10^{6} \mathrm{~m} \mathrm{~s}^{-1}$, is

1 $4 \mathrm{~N}$ in $\mathrm{z}$ - direction
2 $8 \mathrm{~N}$ in $\mathrm{y}$ - direction
3 $8 \mathrm{~N}$ in $\mathrm{x}$ - direction
4 $8 \mathrm{~N}$ in $\mathrm{z}$ - direction
Moving Charges & Magnetism

153539 A particle with charge $1.6 \times 10^{-5} \mathrm{C}$ is moving with a velocity of magnitude $3 \mathrm{~m} / \mathrm{s}$ in uniform magnetic field of $2 \mathrm{~T}$. The direction of velocity remains perpendicular to the direction of magnetic field. What is the magnitude of net force on the particle?

1 $4.6 \times 10^{-5} \mathrm{~N}$
2 $9.6 \times 10^{-5} \mathrm{~N}$
3 $5.6 \times 10^{-5} \mathrm{~N}$
4 $12.2 \times 10^{-5} \mathrm{~N}$
Moving Charges & Magnetism

153540 A proton moving in perpendicular magnetic field possesses energy ' $E$ '. The magnetic field is increased four times. But the proton is constrained to move in the path of same radius. The kinetic energy will increase

1 2 times
2 16 times
3 8 times
4 4 times
Moving Charges & Magnetism

153541 The work done by an uniform magnetic field, on a moving charge is

1 zero because $\overrightarrow{\mathrm{F}}$ acts parallel to $\overrightarrow{\mathrm{V}}$
2 positive because $\overrightarrow{\mathrm{F}}$ acts perpendicular to $\overrightarrow{\mathrm{V}}$
3 zero because $\vec{F}$ acts perpendicular to $\vec{V}$
4 negative because $\overrightarrow{\mathrm{F}}$ acts parallel to $\vec{v}$
Moving Charges & Magnetism

153542 Assertion: A charge particle is released from rest in magnetic field then it will move in circular path.
Reason: Work done by magnetic field is non zero.

1 If both assertion and reason are true and reason is the correct explanation of assertion.
2 If both assertion and reason are true but reason is not the correct explanation of assertion.
3 If assertion is true but reason is false.
4 If both assertion and reason are false.
Moving Charges & Magnetism

153544 The magnetic force acting on a charged particle of charge $-2 \mu \mathrm{C}$ in a magnetic field of 2 $T$ acting in $y$ direction, when the particle velocity is $(2 \hat{\mathbf{i}}+3 \hat{\mathbf{j}}) \times 10^{6} \mathrm{~m} \mathrm{~s}^{-1}$, is

1 $4 \mathrm{~N}$ in $\mathrm{z}$ - direction
2 $8 \mathrm{~N}$ in $\mathrm{y}$ - direction
3 $8 \mathrm{~N}$ in $\mathrm{x}$ - direction
4 $8 \mathrm{~N}$ in $\mathrm{z}$ - direction