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A circular coil of radius 2.00cm has 50 turns. A uniform magnetic field B=0.2T exists in the space in a direction parallel to the axis of rthe loop. The coil is now rotated about a diameter through an angle of 60^(@) . The operation takes 0.Is . The average emf induced in the coil is

Six point charges , each of the same magnitude q, are arranged in different manners as shown in Column II . In each case, a point M and a line PQ passing through M are shown . Let E be the electric field and V be the electric potential at M (potential at infinity is zero ) due to the given charge distribution when it is at rest . Now, the whole system is set into rotation with a constant angular velocity about the line PQ . Let B be the magnetic field at M and mu be the magnetic moment of the system in this condition . Assume each rotating charge to be equivalent to a steady current .

A uniform wire of resistance per unit length lambda is bent into semicircle of radius a . The wire rotates with angular velocity omega in a vertical plane about a orizontal is passing through C . A uniform magnetic field B exists in space in a direction perpendicular to paper inwards. a. Calculate potential difference between points A and D . which point is at higher potential? b. If points A and D are connected by a conducting wire of zero resistance, find the potential difference between A and C .

In a conductor, there are free electrons which continuously move randomly but inside the volume of the conductor. When such a conductor is placed inside a magnetic field then what can you say about the magnetic forces acting on the system?

A magnet is suspended horizontal in the earth's magnetic field. When it is displaced and then released it oscillates in a horizontal plane with a period T. If a place of wood of the same moment of inertia (about the axis of rotation) as the magnet is attached to the magnet what would the new period of oscillation of the system become?

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