A square current carrying loop is suspended in a uniform magnetic field acting perpendicular to the plane of the loop. If the force on one arm of the loop is vec(F) , the net force on the remaining three arms of the loop is

A particle with charge q moving with a velocity v in the plane of the paper enters a uniform magnetc field B, acting perpendicular to the plane of the paper. Deduce an expression for the tie period of the charge, as it moves in a circular path in the field. Why does the kinetic energy of the charge not change, while moving in the magnetic field?

Figure shows a conducting rod PQ in contact with metal rails RP and SQ, which are 0.25 m apart in a uniform magnetic field of flux density 0.4T acting perpendicular to the plane of the paper. Ends R and S are connected through a 5 Omega resistance. What is the emf when the rod moves to the right with a velocity of 5ms^(-1) ? What is the magnitude and direction of the current through the 5 Omega resistance? If the rod PQ moves to the left with the same speed, what will be the new current and its direction?

Figure shows a rectangular conductor PQRS in which the conductor PQ is free to move in a uniform magnetic field B perpendicular to the plane of the paper.The field extends from x=0 to x=b and is zero for x>b.Assume that only the arm PQ posses resistance r.When the arm PQ is pulled outward from x=0 with constant speed v, obtain the expressions for the flux and the induced emf with distance 0≤x≤2b

An irregular shaped wire PQRS shown in the figure. placed in a uniform magnetic field perpendicular to the plane of the paper changes into a circular shape. Show with reason the direction of the induced current in the loop.

A conducting circular loop is placed in a uniform magnetic field, B=0.025T with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of 1 mms^(-1) . The induced emf when the radius is 2 cm is

A conductor of length l is moved perpendicular to uniform magnetic field B with velocity v as shown in the figure The e.m.f. induced across the length of the conductor is

A metallic square loop ABCD is moving in its own plane with velocity v in a uniform magnetic field perpendicular to its plane as shown in the figure. An electric field is induced.

One conducting U-tube cam slide inside another as shown in figure maintaining electrical contacts between the tubes. The megnatics field B is perpendicular to the plane of the figure. If each tube moves towards the others at a constant speed v, then the e.m.f. induced in the circuit in terms of B, l and v, where l is the width of each tube, will be

A rectangular coil of N turns and ara of cross-section A is held in a time-varying field given by B = B_0 cosomegat , with the plane of the coil noral to the magnetic field. Deduce an expression for the e.m.f. induced in the coil.