A rectangular wire frame having length 2.5 cm & width 2 cm is placed in a uniform magnetic field of 2T. Such that plane of frame of rectangular wire is in the plane of magnetic field. After time t = 10sec. Area vector makes an angle `60^@` with magnetic field then find induced emf.

A conducting ring is placed in a uniform magnetic field with its plane perpendicular to the field . An emf is induced in the ring if

A circular loop of area 1cm^2 , carrying a current of 10 A , is placed in a magnetic field of 0.1 T perpendicular to the plane of the loop. The torque on the loop due to the magnetic field is

A straight wire of length 0.5 m carrying a current of 1.6 ampere is placed in a uniform magnetic field of induction 2 T. If the magnetic field is perendicular to the length of the wire, then force on the wire is

A conducting wire is bent in the form of a square of side 8 cm and is placed in a region of magnetic field of 0.05 T, such that the plane of coil is perpendicular to the magnetic field. If the side of square starts decreasing at a rate of 10^(-3) m s^(-1) , what will be the emf induced in the coil when the area of coil is reduced to just half?

A coil of area 5cm^(2) and having 20 turns is placed in a uniform magnetic field of 10^(3) gauss. The normal to the plane of the coil makes an angle of 60^(@) with the magnetic field. The flux in Maxwell through the coil is:

A rectangular coil of 100 turns has length 5 cm and width 4 cm. it is placed with its plane parallel to a uniform magnetic field and a current of 2 A is sent through the coil. Find the magnitude of the magnetic field B, if the torque acting on the coil is 0.2 Nm^(-1).

A straight wire 50cm long carries a current of 5A . It is placed at right angle to a uniform magnetic field of 1T . Find the mechanical force on the wire and the power required to move it at 10ms^-1 in a plane at right angles to the magnetic field.