MOVING CHARGES AND MAGNETISM Set 4

An electron and a proton of equal linear momentum enter in the direction perpendicular to uniform magnetic field. If the radii of their circular paths be respectively, then is equal to mass of electron, mass of proton.

An electron of mass and charge is travalling with a speed along a circular path of radius at right angles to a uniform of magnetic field If speed of the electron is doubled and the magnetic field is halved, then resulting path would have a radius of

A charged particle enters in a magnetic field whose direction is parallel to velocity of the particle, then the speed of this particle

Two circular concentric loops of radii are placed in the plane as shown in the figure. A current is flowing through them. The magnetic moment of this loop system is

A charged particle is moving in a magnetic field of strength perpendicular to the direction of the field. If denote the charge and mass of the particle respectively, then the frequency of rotation of the particle is

If two parallel wires carry current in opposite directions

An electron is shot in steady electric and magnetic fields such that its velocity electric field and magnetic field are mutually perpendicular. The magnitude of are mutually perpendicular. The magnitude of is 1 and that of is 2 T. Now if it so happens that the Lorentz (magnetic) force cancels the electrostatic force on the electron, then the velocity of the electron is

Two parallel conductors and of equal lengths carry currents I and 10 I, respectively, in the same direction. Then

An electron is moving at right angle to the uniform magnetic field
3.534 × 10⁻⁵ T. The time taken by the electron to complete a circular orbit is

Two long wires are hanging freely. They are joined first in parallel and then in series and then are connected with a battery. In both cases, which type of force acts between the two wires