What is the magnitude of the induced currents in circular loop KLMN of radius r if the straight wire PQ carries a steady current of magnitude `i` ampere?

What is the nature of magnitude lines of force due to current in a straight conductor?

The magnitude of magnetic induction for a current carrying toroid of uniform cross-section is

The magnitude of electric current is from A towards B. If there is any induced current in the loop as shown in the figure, what will be its direction?

State the Biot-Savart's law for the magnetic field due to a current carrying element. Use this law to obtain a formula for magnetic field at athe centre of circular loop of radius r carrying steady current I . Sketch the magnetic field lines for a current loop clearly indicating the direction of the field.

Explain with reason, in which direction does the current loop KLMN move when kept near an infinitely long straight wire carrying current as shown in figure.

A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is B. It is then bent into a circular loop of n turns. The magnetic field at the centre of the coil will be :

A metallic wire carrying a current I is bent into the form as shown in the figure. The circular portion ABC of the wire is of radius r and the straight portion AC subtends an angle 2theta at the centre O. Find the magnetic field due to the conductor at point O. If the radius of the curved path is r, find the magnetic field at the centre O.

Two long straight, current-carrying conductors , PQ and XY, are held a constant distance apart as shown in the figure. The conductors carry the magnitude of current in the same direction . A plan view form above the conductors is shown in the figure. Draw arrows, one in each case, to show the direction of the magnetic field at Q due to the current in wire XY. the force at Q as a result of the magnetic field due to the current in wire XY.