### Experiments

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.

### Silent Features

• Magnetic filed measure in boh the direction.
• Distance between coil is adjusted in U channel bench.
• Modular approach.
• Electrical safety tested for Power supply & Gaussmeter.

Principle and Working:
The magnetic field of the coil arrangement is rotationally symmetrical about the axis of the coils, which is chosen as the x-axis of a system of cylindrical coordinates (x, r, Φ). The origin is at the centre of the system. The magnetic flux density does not depend on the angle Φ, so only the components Bx (x, r) and Br (x, r) are measured.
In the present setup, a fairly uniform magnetic field is to use a pair of circular coils on a common axis with equal currents flowing in the same logic. For a given coil radius, you can calculate the separation needed to give the most uniform central field.

Scope of Supply:

 Cat. No. Item Name Qty. SE079 Power supply DC 0-16V, 5 Amp 1 C4939 Digital gauss meter with axial probe 1 SV628 Coil N=390, dia=150mm 2 SH317 Support base 2 CD038 Support rod 2 CD036 Base for helmholtz coil 1 CD043 U channel small 1 CD042 Deflection compass with Base 1 CD039 Axial probe holder 1 SE067 Digital multimeter 1 SN201 Lead 100cm black 2 SN204 Lead 100cm red 1 SN203 Lead 50cm red 1 SN206 Lead 50cm yellow 1