The conducting circular loops of radii `R_(1) and R_(2)` are placed in the same plane with their centres coinciding. If `R_(1) gt gt R_(2)`, the mutual inductance M between them will be directly proportional to

Two conducting circular loops of radii R_1 and R_2 are placed in the same plane with their centres coinciding. If R_1 >> R_2 the mutual inductance M between them will be directly proportional to

Two conducting circular loops of radii R_1 and R_2 are placed in the same plane with their centres coincidingt. Find the mutual inductane between them assuming R_2ltltR_1 .

Two concentric circular coils of radius r and R are placed coaxially with centres coinciding If R gt gt r then calculate the mutual inductance the coils.

Two circular loops of radius r and R ( R gt gt r ) are placed coaxially with their centres coinciding. What will be the mutual inductance for the pair? If one of the coils is rotated through 90^(@) angle, then what will be the new mutual inductance?

Two coaxial circular loops of raadii r_(1) and r_(2) are separated by a distance x and carry currents i_(1) and i_(2) respectively. Calculate the mutual inductance. What is the force between the loops ?

Two circular coils, one of smaller radius r_(1) and the other of very large radius r_(2) are placed co-axially with centres coinciding. Obtain the mutual inductance of the arrangement.

Two concentric circular loops of radii r_(1) and r_(2) carry clockwise and anticlockwise currents i_(1) and i_(2) . If the centre is a null point, i_(1)//i_(2) must be equal to

Two thin metallic spherical shells of radii r_(1) and r_(2) (r_(1)lt r_(2)) are placed with their centres coinciding. A material of thermal conductivity K is filled in the space between the shells. The inner shells. Is maintained at temperature theta_(1) .and the outer shell at temperature theta_(2) (theta_(1)lttheta_(2). Calculate the rate at which heat flows radially through the material.

A small coil of radius r is placed at the centre of a large coil of radius R , where R gtgt r . The two coils are coplanar. The mutual inductance between the coils is proportional to