Recent questions and answers in Moving Charges and Magentism

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

answered Jun 2, 2018 by kasirnazir620

2 answers

A current carrying square loop is placed near an infinitely long current carrying wire. The torque acting on the loop is

answered Mar 27, 2014 by meena.p

1 answer

A current caring wire AB is placed near another long current carrying wire CD. If free to move AB will have D.

answered Mar 27, 2014 by meena.p

1 answer

A beam of electrons travels at $3 \times 10^{6} m/s$ through a uniform magnetic field of $4 \times 10^{-2} T$ at right angles to the field, as shown in the figure. How strong is the force acting on each electron?

answered Mar 14, 2014 by balaji.thirumalai

1 answer

Find the magnetic field at point P in the figure below, where I = 15 A and R = 20 cm.

answered Mar 14, 2014 by balaji.thirumalai

1 answer

A solenoid is 2.7-m long, has a radius of 0.85 cm, and has 600 turns. It carries a current I of 2.5 A. What is the magnitude of the magnetic field B inside the solenoid and far from either end?

answered Mar 14, 2014 by balaji.thirumalai

1 answer

If an electron and a proton having same momentums enter perpendicularly to a magnetic field, then

answered Mar 3, 2014 by thanvigandhi_1

1 answer

An uniform electric field and an uniform magnetic field are acting along the same direction in a certain region. If an electron is projected along the direction of the fields with a certain velocity, then

answered Feb 28, 2014 by thanvigandhi_1

1 answer

In a region, steady and uniform electric and magnetic fields are present. These two fields are parallel to each other. A charged particle is released from rest in this region. The path of the particle will be a

answered Feb 28, 2014 by thanvigandhi_1

1 answer

Mark the correct option

answered Feb 27, 2014 by thanvigandhi_1

1 answer

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

answered 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

answered Feb 25, 2014 by thanvigandhi_1

1 answer

Consider the following statements \[\] Statement 1: The energy of a charged particle cannot change in magnetic field \[\] Statement 2: If the magnetic field does not change with time, there is no induced electric

answered 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

answered 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

answered Feb 25, 2014 by thanvigandhi_1

1 answer

Infinitely long wires parallel to the $y$ - axis are present in the $x-y$ plane at $x = 1, x = 2, x = 4$, and so on. The currents in all the wires with odd serial no is $1A $ in the $+y$ direction while it is $1A$ in the $–y$ direction for all the wires with even serial no. The magnetic field at the origin would be

answered Feb 25, 2014 by thanvigandhi_1

1 answer

A straight wire of length $\ell$ carries a current $i$. The magnitude of magnetic field at the point $P$ is

answered Feb 25, 2014 by thanvigandhi_1

1 answer

Consider the following statements \[\] Statement 1: A solenoid tends to expand when a current passes through it \[\] Statement 2: Two parallel metallic wires carrying current in the same direction repel each other

answered Feb 23, 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

answered Feb 23, 2014 by thanvigandhi_1

1 answer

A square loop of side $a$ carrying a current $i_1$ is kept at a distance of $a$ from an infinite wire carrying a current $i_2$ as shown. The torque on the loop is

answered Feb 23, 2014 by thanvigandhi_1

1 answer

A rectangular loop carrying a current is situated near a long straight wire as shown. If a current $i$ now starts flowing through the wire, the loop will

answered Feb 23, 2014 by thanvigandhi_1

1 answer

A conducting wire bent in the form of a parabola $y^2 = 2x$ for $0 \leq x \leq 2$, carries a current $i = 1A$ in anti- clockwise direction as looked from above the $x-y$ plane. There exists uniform magnetic field $-2 \hat k$ Tesla in the region. The magnetic force on the wire is

answered Feb 23, 2014 by thanvigandhi_1

1 answer

A particle of specific charge (charge/mass) α starts moving from the origin under the action of an electric field $E_0 \hat i$ and a magnetic field $B_0 \hat k$ . Its velocity at $(x_0, 0, 0)$ is $4 \hat i + 3 \hat j$. The value of $ x_0$ is

answered Feb 23, 2014 by thanvigandhi_1

1 answer

A current carrying wire $PQ$ is placed $ \perp$ to another wire $RS$ carrying a constant current. If the second wire is free to move, it will have

answered 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

answered Feb 23, 2014 by thanvigandhi_1

1 answer

A particle having charge $q$ enters a region of uniform magnetic field $B$ directed inwards and is deflected as shown to a distance $d$ above the original line of flight as shown. What is the (magnitude of) momentum of the particle?

answered 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

answered 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

answered Feb 23, 2014 by thanvigandhi_1

1 answer

Two identical coils are placed coaxially. They carry equal currents in the same direction. Then

answered Feb 23, 2014 by thanvigandhi_1

1 answer

A conducting rod of mass $m$ and length $L$ is moving down a smooth incline plane on inclination $ \theta$ with constant velocity $ v$. A current $i$ is flowing in the conductor in a direction perpendicular to the paper inwards. A vertically upward magnetic field $ \overrightarrow B$ exists in space. Its magnitude is

answered Feb 23, 2014 by thanvigandhi_1

1 answer

Magnetic field at the centre of a circular loop of area $A$ is $B$. Then magnetic moment of the loop is

answered 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

answered Feb 23, 2014 by thanvigandhi_1

1 answer