Higher Physics Lab Electricity & Magnetism



Exp-1 Susceptibility of paramagnetic sample by using quinck's tube method.

  • Compact electro magnet.
  • Stackable power supply & gauss meter.
  • Electrical safety tested.
  • High magnetic field.
  • Susceptibility.
  • Para magnetism.
  • Magnetic field.
  • Quinck's tube.

Principle and Working:
Quinck's method is based on the force experienced by a magnetised material in a non-uniform magnetic field and is a version of Gouy's method. It is specially adapted for liquids. On the basis of susceptibility, a substance can be classified as diamagnetic, paramagnetic and ferromagnetic, which is an important observation in material science.
In the present setup, the liquid moves under the action of the total force F until it is balanced by the pressure exerted over the area A due to a height difference 2h between the liquid surfaces in the two arms of the U-tube. Allowing for the susceptibility χa and density ρa of the air which the liquid displaces, it follows that,

A (X-Xa).(B2-B02)/2 µ0=2Ah (ρ-ρa)g

where g is the acceleration due to gravity, ρ density of liquid, so that
(X-Xa) (B2-B02)=4 µ0h (ρ-ρa)g

by plotting h as a function of B2, the susceptibility χ can be determined directly from the slope of the graph.


Cat. No. Item Name Qty.
CD541 Electromagnet 1
SE079 Power Supply for Electromagnet 1
C0994 U Tube with Stand 1
SF908 Traveling Microscope 1
SEA20 Digital Gauss Meter 1
SN204 Connecting Lead Red 1
SN201 Connecting lead Black 1
SN206 Connecting Lead Yellow 1
R8213 Electronic Balance 1
FECL Ferric Chloride (FeCl3) 500gm 1
SC211 Measuring Cylinder 100ml 1
SF055 Pipette 10ml 1
SC379 Funnel 1
SJ015 Dropper 1

Electricity & Magnetism Experiments