Description
We offer Apparatus for Measurement of Susceptibility of
Paramagnetic Solids by Gouy’s Method in this, the solid sample in
the form of a long cylinder (area of cross section A) is hung from
the pan of a balance and is placed such that one end of the sample
is between the pole-pieces of the magnet (field H ) and the
other one is outside the field. The force exerted on the sample by
the inhomogeneous magnetic field is obtained by measuring the
apparent change (Δm ) in the mass of the sample. The susceptibility
χ is given by
χ = 2Δmg/AH2
If the sample is in the form of powder, it is filled in a long
nonmagnetic tube which is then suspended from the pan of the
balance.
The set up consists of the following:
(a) Scientific Balance, KSB**7
Capacity: **0 gms
Sensitivity: 1/*0 mg. by
vernier
Beam: Hard Bronze/ Brass
Arrestment: Circular, falling away
type
Air Damping: Very quick and
positive, beam coming to rest in **3 sec
Chainomatic Device: A gold plated chain
is suspended from the beam with its other end screwed on the
rotating drum on which a scale graduated from 0 to *0 div each
division representing 1mg is installed. By the movement of this
scale before a vernier, reading upto 1/*0th mg is taken
(b) Sample in the form of a long rod:
Set of 4 samples, 2 each of Ebonite and Wood
(c) Electromagnet, Model EMU**5T
Pole Pieces: *5mm tappered to *5mm
Mag. Field: *0KG at 6mm airgap
Energising Coils: Two of approx.
*3&branded; each
Power: ***0Vdc, 3A, for coils in
series
***5Vdc, 6A, for coils in parallel
(d) Constant Current Power Supply, Model DPS***5
Current: **3A per coil Smoothly adjustable
Line Regulation: ±0.1% for *0% mains variation
Load Regulation: ±0.1% for load variation from 0 to max.
Display: 3½ digit, 7 segment LED display
Protection: Protected against overload, short circuit and
transients caused by the load inductance.
Power: **0V *0%, *0Hz or **0V *0%, *0Hz as required
Weight: *3Kg.
(e) Gaussmeter, Model DGM***2 or DGM***2
The experiment is complete in all respect.
