A copper wire bent in the shape of a semicircle of radius r translates in its plane with a constant velocity v. A uniform magnetic field B exists in the direction perpendicular to the plane of the wire. Find the emf induced between the ends of the wire if (a) the velocity is perpendicular ot the diameter joining free ends, (b) the velocity is parallel to this diameter.

A conducting wire bent but in the shape of semicircle has length L and mvoes in its plane with constant velocity V. A uniform magnetic field B exists in the direction perpendicular to the plane of the wire. The velocity makes an angles 45^@ to diameter joining free ends. and the emf induced between the ends of the wire is Phi = alpha (BvL) . The value of constant alpha is

A straight wire of length L is bent into a semicircle. It is moved in a uniform magnetic field with speed v with diameter perpendicular to the field. The induced emf between the ends of the wire is

A straight wire of length L is bent into a semicircle. It is moved in a uniform magnetic field with speed v with diameter perpendicular to the field. The induced emf between the ends of the wire is

A wire loop confined in a plane is rotated in its open plane with some angular velocity. A uniform magnetic field exists in the region. Find the emf induced in the loop.

A wire loop confined in a plane is rotated in its open plane with some angular velocity. A uniform magnetic field exists in the region. Find the emf induced in the loop.

A circular wire of radius r and with a constant current I is placed in a magnetic field vecB such that the direction of B is perpendicular to the plane of the wire. The value of the magnetic force on the circular wire—

Figure shows a wire sliding on two parallel, conducting rails placed at a separation L . A magnetic field B exists in a direction perpendicular to the plane of the rails. What force is necessary to keep the wire moving at a constant velocity V ?

Figure shows a wire sliding on two parallel, conducting rails placed at a separation L . A magnetic field B exists in a direction perpendicular to the plane of the rails. What force is necessary to keep the wire moving at a constant velocity V ?