In the neutral point topic , what is the orientation of the magnet?
The orientation of the magnet here with respect to earth's magnetic field is the magnet is perpendicular to the earth's magnetic field.
18)The sensitivity of the potentiometer wire can be increased by
increasing the length of the wire.But usually we are satisfied With 10 m long
Wire. Why?
Every joint introduces some resistance which is not taken into consideration. This may introduce error in the measurement. Further it is not necessary that the wire has uniform thickness throughout its length