Two circular loops are placed with their centres separted by a fixed distance. How would you orient the loops to have (a) the largest mutual inductance (b) the smallest mutual inducatance?

Two circular loops are placed coaxially but separated by a distance. A battery is suddenly connected to one of the loops establishing a current in it. Will there be a current induced in the other loop? If yes, when does the current start and when does it end? Do the loops attract each other or do they repel?

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 insulated copper sphere of charges +10 mu C and -20 mu C have their centres seprated by a distance of 10 cm . What is the force of attraction if they placed. a in free space b. in water of dielectric constant 81.

Two insulated charged copper spheres A and B have their centres separated by a distance of 50 cm. What is the mutual force of electrostatic repulsion if the charge on each is 6.5 xx 10^(-2)C? The radii of A and B are negligible compared to the distance of separation. b. What is the force of repulsion if each sphere is charged double the above amount and the distance between them is halved?

Shown a circular coil of N turns and radius a, connected to a battery of emf epsilon through a rheostat. The rheostat has a total length L and resistance R. The resistance of the coil is r. A small circular loop of radius a' and resistance r' is placed coaxially with the coil. The centre of the loop is at a distance x from the centre of hte coil. In the beginning, the sliding contact of the rehostat is at the left end and then on wards it is moved towards right at a constant speed v. Find the emf induced int he small circular loop at the instant (a) the contact begins to slide and (b) it has slid thrugh half the length of the rheostat.

The magnetic field B due to a current- carrying circular loop of radius 12cm at its center is 0.50 xx (10^-4) T . Find the magnetic field due to this loop at a point on the axis at a distance of 5.0 cm from the centre.

The current in a long solenoid of radius R and having n turns per unit length is given by i= i_0 sin omega t . A coil having N turns is wound around it near the centre. Find (a) the induced emf in the coil and (b) the mutual inductance between the solenoid and the coil.

Find the mutual inductance between the circular coil and the loop shown in figure.

A circular loop of radius a, carrying a current I, is placed in a tow dimensional magnetic field. The centre of the loop coincides with the centre of the filed The strenght of the magnetic field at the pariphery of the loop is B. find the magnetic force on the wire.

A circular loop of radius r carrying a current i is held at the centre of another circular loop of radius R(>> r) carrying a current I. The plane of the smaller loop makes an angle of 30^@ with that of the larger loop. It the smaller loop is held fixed in this position by applying a single force at a point on its periphery, what would be the minimum magnitude of this force?