Chapter Test: Magnetic Effects of Current - 1 JEE Physics Free MCQs

The figure shows a conducting loop ABCDA placed in a uniform magnetic field perpendicular to its plane. The part ABC is the (3/4)^th portion of the square of side length l. The part ADC is a circular arc of radius R. The points A and C are connected to a battery which supply a current I to the circuit. The magnetic force on the loop due to the field B is

The mutual inductance between the rectangular loop and the long straight wire as shown in figure is M.

There are two conducting wires along the x axis and the y axis. Both wires carries current as shown. The currents flow in positive x direction and positive y direction. The wires do not intersect at the origin. Find the equation of the line along which the magnetic field vanishes.

Ratio of magnetic force F_m and electric force F_e acting on a charge getting undeflected through the field is

Time taken by an ion to describe a semicircular path, in a cyclotron

If a charged particle goes undeflected in a region containing electric and magnetic fields. Select all of the following statements that must be true for this.

1. must be perpendicular to
2. must be perpendicular to
3.  must be perpendicular to 
4.  E must be equal to vB​

The dipole moment of a current loop is independent of:

If cathode rays are projected at right angles to a magnetic field, their trajectory is