# Introduction Quinke’s Method

In this video I have discussed about the calculation of the magnetic susceptibility by using the Quinke’s experiment. What are the important points for the measurement of the magnetic susceptibility in Physics Lab in addition to the manual errors:

These are;

1. First point is about the magnetic field intensity; generally in this experiment student measure the magnetic field density which they understand it as magnetic field intensity (B= is magnetic induction, or magnetic field density unit is Gauss in CGS or Tesla in SI System; H is the magnetic field intensity and the unit is Amp per meter in SI system; B and H are related by B=munot H; where munot is magnetic permeability of free space). Students measure the magnetic field density by Gauss meter in terms of KGauss and in SI system that is in Tesla.

2. In this experiment for the measurement of the magnetic susceptibility intensity of external magnetic field is required i.e. H

3. Please refer the formula mention in the video, for more information of the formula you can see the paper [Timoth H Boyer, American Journal Physics. 56 (8) Aug 1988]. One can get the information about the force.

4. Next point is about the graph, here to making the graph it is not necessary that when you make the graph that all the points lies or exist on the line. You draw a line which passes near about to the maximum points. Then you take the slope from that line. Now use this slope in calculation and find the measured susceptibility of FeCl3 solution. It is not necessary that line always passes through the measured points. Don’t skip any point to include in the graph.

5. After finding the slope put this value in the formula and remember that all the physical quantity should be in same unit system either in CGS or SI System.