In a uniform magneitc field of induced B a wire in the form of a semicircle of radius r rotates about the diameter of the circle with an angular frequency `omega`. The axis of rotation is perpendicular to the field. If the total resistance of the circuit is R, the mean power generated per period of rotation is

A wire is bent to form a semi-circle of radius a. The wire rotates about its one end with angular velocity omega . Axis of rotation being perpendicular to plane of the semicircle. In the space, a uniform magnetic field of induction exists along the axis of rotation as shown. The correct statement is

A wire is bent to form a semicircle of the radius a. The wire rotates about its one end with angular velocity omega . Axis of rotation is perpendicular to the plane of the semicircle . In the space , a uniform magnetic field of induction B exists along the aixs of rotation as shown in the figure . Then -

A circular wire of radius r rotates about its own axis with angular speed w in a magnetic field B perpendicular to its plane, then the induced e.m.f. is

A wire shaped as a semi-circle of radius a rotates about sn sxis OO' with an angular velocity omega in a unifrom magnetic field of induction B' (Fig). The rotation axis is perpendicular to the field direction. The total resistance of the circuit is equal to R . NEglecting the magnetic field of the induced current, find the meand amount of thermal power being generated in the loop fueing a rotation period.

A conducting circular loop of raidus r is rotated about its diameter at a constant angular velocity omega in a magnetic field B perpendicular to the axis of rotation. In what position of the loop is the inducedj emf zero?

A solid cylinder of mass M and radius R rotates about its axis with angular speed omega . Its rotational kinetic energy is

A rectangular coil of single trun, having area A , rotates in a uniform magnetic field B with an angular velocity omega about an axis prependicular to the field. If initially the plane of the coil is perpendicular to the field, then the average induced emf when it has rotate through 90^(@) is