Exp-1 To measure the magnetic flux density along the x-axis of the circular coils when the distance between them a = R (R = radius of the coils) and when it is greater and less than this. Exp-2 To measure the spatial distribution of the magnetic flux density when the distance between coils a = R, using the rotational symmetry of the set-up. PHYSICS, Class XII, Part - 1, Chapter - 4, Moving Charges & magnetism. Magnetic filed measure in boh the direction. Distance between coil is adjusted in U channel bench. Electrical safety tested for Power supply & Gaussmeter.