plane of eddy currents make an angle with the plane of magnetic lines of force equal to

The figure below shows the north and south poles of permanent magnet in which n turn coil of area of cross-section A is resting, such that for a current I passed through the coil, the plane of the coil makes an angle with respect to the direction of magnetic field B . If the plane of the magnetic field and the coil are horizontal and vertical respectively, the torque on the coil will be

Assertion : If a varying current is flowing through a machine of iron, eddy currents are produced. Reason : change in the magnetic flux thro' an area causes eddy currents.

A coil is suspended in a uniform magnetic field, with the plane of the coil parallel to the magnetic lines of force. When a current is passed through the coil it starts oscillating, It is very difficult to stop. But if an aluminium plate is placed near to the coil, it stops. This is due to :

A flat coil of n turns, area A and carrying a current I is placed in a uniform magnetic field of magnitude B . The plane of the coil makes an angle theta with the direction of the field. The torque acting on the coil is

A magnetic needle is free to rotate in a vertical plane which makes an angle of 60^@ with the magnetic meridian. If the needle stays in a direction making an angle of tan^-1(2//sqrt3) with the horizontal, what would be the true dip at that place?

A rectangular coil of wire carrying a current is suspended in a uniform magnetic field. The plane of the coil is making an angle of 30^(@) with the direction of the field and the torque experienced by it is tau_(1) and when the plane of the coil is making an angle of 60^(@) with the direction of the field the torque experienced by it is tau_(2) . Then the ratio tau_(1):tau_(2) is

A bar of cross section A is subjected to equal and opposite tensile forces F at its ends. Consider a plane through the bar making an angle theta with a plane at right angles to the bar as shown in figure. The shearing stress at the plane, in terms of F, A and theta is

A bar of cross section A is subjected to equal and opposite tensile forces F at its ends. Consider a plane through the bar making an angle theta with a plane at right angles to the bar as shown in figure. The tensile stress at this plane in terms of F, A and theta is

A uniform electric field E exists in a region of space. A charged particle is projected in the plane of electric field making an angle 0 with the direction of field. Is it possible to make the particle move in a straight line by applying a uniform magnetic field?