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Recent questions tagged motion-in-a-magnetic-field

Consider the following statements \[\] Statement 1: A proton enters a strong magnetic field along the field direction. Its path and velocity remain the same\[\] Statement 2: The field exerts no force on the particle

asked Feb 25, 2014 by thanvigandhi_1

1 answer

Consider the following statements \[\] Statement 1: A magnetic field interacts with a moving charge and not with a stationary charge \[\] Statement 2: A moving charge produces a magnetic field

asked Feb 25, 2014 by thanvigandhi_1

1 answer

Consider the following statements \[\] Statement 1: The energy of a charged particle does not change in spatially varying magnetic field \[\] Statement 2: The instantaneous work done by magnetic field is zero

asked Feb 25, 2014 by thanvigandhi_1

1 answer

Consider the following statements \[\] Statement 1: The energy of a charged particle in a uniform magnetic field does not change \[\] Statement 2: Magnetic field does no work

asked Feb 25, 2014 by thanvigandhi_1

1 answer

Consider the following statements. Assume the given field to be non-intersecting \[\] Statement 1: Given a field, it is always possible to construct current elements having the magnetic field similar to the given field \[\] Statement 2: Given a field, it is always possible to construct charge distributions having the electric field similar to the given field

asked Feb 23, 2014 by thanvigandhi_1

1 answer

A metallic wire is folded to form a square loop of side $a$. It carries a current $i$ and is kept $ \perp$ to a uniform magnetic field. If the shape of the loop is changed from a square to a circle without changing its length or current, the amount of work done is

asked Feb 23, 2014 by thanvigandhi_1

1 answer

An electron moving with a speed $u$ along the $+ve\: x$ - axis and at $y = 0$ enters a region of uniform magnetic field $\overrightarrow B = -B_0 \hat k $ after sometime with speed $v$ at co-ordinate $ y$, then which exists to the right of the $ y$ - axis. The electron exits from the region

asked Feb 23, 2014 by thanvigandhi_1

1 answer

Velocity and acceleration vector of a charged particle moving in a magnetic field at some instant are $ \overrightarrow V = 3\hat i + 4\hat j\: and\: \overrightarrow B= 2\hat i + x \hat j$. Select the incorrect alternative

asked Feb 23, 2014 by thanvigandhi_1

1 answer

A proton, a deuteron and an $ \alpha$ - particle having the same kinetic energy are moving in circular trajectories in a constant magnetic field. If $r_p, r_d$ and $r_{\alpha}$ denote respectively the radii of the trajectories of these particles, then

asked Feb 23, 2014 by thanvigandhi_1

1 answer

A charged particle is projected with velocity $ \upsilon_0$ along the positive $x$ - axis. The magnetic field $B$ is directed along negative $z$ - axis for the region $0<x<L$. The particle emerges out at $x = L$ at an angle of $60^{\circ}$ with the direction of projection. Find the velocity with which the same particle is projected at $x=0$ along the $+ve\: x$ - axis so that when it emerges out at $x = L$, the angle made by it is $30^{\circ}$ direction of projection with the

asked Feb 22, 2014 by thanvigandhi_1

1 answer

An electric current $\imath$ enters and leaves a uniform circular wire of radius $ \Re$ through diametrically opposite points. A charged particle q moving along the axis of the circular wire passes through the centre at speed $v$. The magnetic force acting on the particle when it passes through the centre is

asked Feb 22, 2014 by thanvigandhi_1

1 answer

A ring of mass m, radius R having charge q uniformly distributed over it and free to rotate about its own axis is placed in a region having a magnetic field B parallel to its axis. If the magnetic field is suddenly switched off, the angular velocity acquired by the ring is

asked Feb 22, 2014 by thanvigandhi_1

1 answer

A uniform magnetic field exists in a region which forms an equilateral triangle of side $a$. The field is perpendicular to the plane of the triangle. A charge $q$ enters the triangle with speed $v$ along the $ \perp$ bisector of one of the sides and comes out along the $\perp$ bisector of the other side. Intensity of the magnetic field is

asked Feb 22, 2014 by thanvigandhi_1

1 answer

Consider the following statements \[\] Statement 1: A cyclotron cannot accelerate neutrons \[\] Statement 2: Neutrons are neutral

asked Feb 22, 2014 by thanvigandhi_1

1 answer

A current carrying wire is kept along a magnetic line of force. The force experienced by the wire due to the magnetic field is

asked Feb 21, 2014 by thanvigandhi_1

1 answer

An electron falling under gravity enters a region of uniform magnetic field pointing north to south. The particle will deflect towards

asked Feb 21, 2014 by thanvigandhi_1

1 answer

The amount of energy gained in half a revolution by an electron of mass m, velocity v and charge e in a uniform magnetic field is

asked Feb 21, 2014 by thanvigandhi_1

1 answer

When a charged particle passes through a region of uniform magnetic field

asked Feb 21, 2014 by thanvigandhi_1

1 answer

Two observers moving with different velocities see that a point charge produces same magnetic field at a point $A$. Their relative velocity must be parallel to , $ \overrightarrow r$ where $ \overrightarrow r$ is the position vector of point $A$ w.r.t. the point charge. This statement is

asked Feb 21, 2014 by thanvigandhi_1

1 answer

A particle is projected perpendicular to a uniform magnetic field. The area bounded by the trajectory of the particle is directly proportional to

asked Feb 21, 2014 by thanvigandhi_1

2 answers

A proton moves in a circular path perpendicular to a magnetic field. If the intensity of the field is doubled and the radius of the circular path is constant, then the kinetic energy of the particle has

asked Feb 21, 2014 by thanvigandhi_1

1 answer

Which of the following statement is false for the equation $ \overrightarrow F = q( \overrightarrow V \times \overrightarrow B)$

asked Feb 21, 2014 by thanvigandhi_1

1 answer

Two protons whose velocities are in the ratio $4 : 1$, move perpendicular to a uniform magnetic field, the ratio of the radii of their paths will be

asked Feb 21, 2014 by thanvigandhi_1

1 answer

A particle of charge $q$ and mass $m$ moves in a circular orbit with radius $r$ and angular speed $ \omega$. The ratio of the magnitude of magnetic moment to its angular momentum depends on

asked Feb 21, 2014 by thanvigandhi_1

1 answer

Two particles $ X$ and $Y$ equal charges enter a region of uniform magnetic field after being accelerated through the same potential difference and describe circular paths of radii $R_X$ and $R_Y$ respectively. The ratio of their masses is

asked Feb 19, 2014 by thanvigandhi_1

1 answer

A particle of charge $q$ and mass $m$ is moving with a constant velocity v along $+x$ - axis. It enters a region of constant magnetic field along $-z$ - axis from $x = a$ to $x = b$. The minimum value of $ v$ required so that the particle can enter the region $x>b$ is

asked Feb 19, 2014 by thanvigandhi_1

1 answer

A charged particle enters a magnetic field with the velocity vector making a $45^{\circ}$ magnetic field. If the pitch of the helical path followed by the particle is $\wp$, its radius will be angle with the

asked Feb 19, 2014 by thanvigandhi_1

1 answer

A conducting ring of mass 2 Kg and radius $0.5m$ is placed on a smooth horizontal surface. The ring carries a current $i = 10A$. A horizontal magnetic field $B = 4T$ is now switched on. The angular acceleration of the ring will be

asked Feb 19, 2014 by thanvigandhi_1

1 answer

A uniform magnetic field $ \overrightarrow B = B_0\hat j$ exists in space. A particle of mass $m$ and charge $q$ is projected towards negative $x$-axis with speed $v$ from a point $(d,0,0)$. The maximum value of $v$ for which the particle does not hit the $y-z$ plane is

asked Feb 19, 2014 by thanvigandhi_1

1 answer

A charged particle is moving along a magnetic field line. The magnetic force on the particle is

asked Feb 17, 2014 by thanvigandhi_1

1 answer

A charged particle is moving in a region of uniform magnetic field and a parallel uniform electric field. At some time the velocity of the particle is perpendicular to the magnetic field. The trajectory of the particle will be

asked Feb 17, 2014 by thanvigandhi_1

1 answer

A charged particle is moving in a constant magnetic field and at some point it has its velocity vector making an acute angle with the magnetic field. The path of the particle will be

asked Feb 17, 2014 by thanvigandhi_1

1 answer

Which of the following particles will have minimum frequency of revolution when projected with the same velocity perpendicular to a constant magnetic field?

asked Feb 17, 2014 by thanvigandhi_1

1 answer

Which of the following particles will describe the smallest circle when projected with the same velocity perpendicular to a constant magnetic field?

asked Feb 17, 2014 by thanvigandhi_1

1 answer

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