A conductor PQ carries a current 'i' is placed perpendicular to a long conductor XY carrying a current I. The direction of force on PQ will be :–

A circular current loop of radius a is placed in a radial field B as shown. The net force acting on the loop is

All straight wires are very long. Both AB and CD are arcs of the same circle, both subtending right angles at the centre O. Then the magnetic field at O is–

A steady current is set up in a cubic network composed of wires of equal resistance and length d as shown in figure. What is the magnetic field at the centre P due to the cubic network ?

An infinitely long straight conductor is bent into the shape as shown in figure. It carries a current I ampere and the radius of the circular loop is r meter. Then the magnetic induction at the centre of the circular part is

What is A in the following reaction?

In the given figure, B is magnetic field at P due to shown segment AB of an infinite current carrying wire. A loop is taken as shown in figure. Which of the following statement(s) is/are correct

A circular current carrying loop of radius R is bent about its diameter by and placed in a magnetic field as shown in figure.

A disc of radius r and carrying positive charge q is rotating with angular speed in a uniform magnetic field B about a fixed axis as shown in figure, such that angle made by axis of disc with magnetic field is Torque applied by axis on the disc is

The magnetic force between wires as shown in figure is :-

Match the reactions given in Column I with the suitable reagents given in Column II.

Match the common names given in Column I with IUPAC names given in column II.

The value of is -

The polynomials and when divided by leaves remainders and respectively then value of if

a=-18/127