Two wires A and B have the same length equal to `44cm`. and carry a current of `10A` each. Wire A is bent into a circle and wire B is bent into a square. (a) Obtain the magnitudes of the fields at the centres of the two wires. (b) Which wire produces a greater magnetic field at the centre?

A wire of length L carrying a current I is bent into a circle. The magnitude of the magnetic field at the centre of the circle is

A wire of length L carrying a current I is bent into a circle. The magnitude of the magneitc field at the centre of the circle is

Two identical wires A and B have the same length l and carry the same current I. Wire A is bent into a circle of radius R and wire B is bent to form a square of side a. If B_1 and B_2 are the values of magnetic induction at the centre of the circle and the centre of the square, respectively, then the ratio B_1//B_2 is

Two identical wires A and B , each of length 'l', carry the same current I . Wire A is bent into a circle of radius R and wire B is bent to form a square of side 'a' . If B_(A) and B_(B) are the values of magnetic field at the centres of the circle and square respectively , then the ratio (B_(A))/(B_(B)) is :

A wire is bent forming two semicircles as shown in the figure. Calculate the magnitude of magnetic intensity at the centre.

A straight wire carrying a current 10 A is bent into a semicircular arc of radius 5 cm . The magnitude of magnetic field at the center is

A part of a long wire carrying a current i is bent into a circle of radius r as shown in figure. The net magnetic field at the centre O of the circular loop is