If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is

A bar magnet having a magnetic moment of 2 $$ \times $$ 10⁴ J T^$$-$$1 is free to rotate in a horizontal plane. A horizontal magnetic field B = 6 $$ \times $$ 10^$$-$$4 T exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction 60^o from the field is

A rectangular, a square, a circular and an elliptical loop, all in the (x-y) plane, are moving out of a uniform magnetic field with a constant velocity. $$\overrightarrow V = v\widehat i$$. The magnetic field is directed along the negative z axis direction. The induced emf, during the passes of these loops, out of the field region, will not remain constant for

A conducting circular loop is placed in a uniform magnetic field 0.04 T with its plane perpendicular to the magnetic field. The radius of the loop starts shrinking at 2 mm/s. The induced emf in the loop when the radius is 2 cm is