A circular conducting loop of radius `R` carries a current `I`. Another straight infinite conductor carrying current `I` passes through the diameter of this loop as shown in the figure. The magnitude of force exerted by the straight conductor on the loop is

An infinite straigh conductor carrying current 2 I is split into a loop of radius r as shown in fig. the magnetic field at the centre of the coil is

There is one long straight conductor carrying current which is kept along the dimaeter of a circular loop without touching it.

A rectangular loop carryinig current I is located near an infinite long straight conductor carrying current I as shown in the figure. The loop,

A circular loop of radius r carries a current i .How should a long, straight wire carrying a current 3i be placed in the plane of the circle so that the magnetic field at the centre of the loop becomes zero?

A circular loop of radius R carries a current I. Another circular loop of radius r(ltltR) carries a current I. The plane of the smaller loop makes an angle of 30^@ with that of the larger loop. The planes of the two circles are at right angle to each other. Find the torque acting on the smaller loop.

A long straight conductor carrying a current i is bent to form an almost complete circular loop of radius r on it. The magnetic field at the centre of the loop