galvanometer THIS IS MY DATA A north pole in CURRENT DIRECTI

galvanometer.

THIS IS MY DATA

A. north pole in- CURRENT DIRECTION IS TO THE LEFT

B. magnet at rest- nothing

C. north pole out - right

D. south pole in - right

E. south pole out- left

questions

why is there no current in step b

why are the currents in opposite directions in a and c

this requires a long answer (told my instructor) why are the currents in the same direction in steps a and e

if the magnet moved faster, is the amount of current larger or smaller? explain why

Solution

1) Galvanometer show the minute current produced due to the motion of the magnet , it is faradays law which says that only changing magnetic fields produce current , if the magnet is at rest , there is no change of field and hence no current is produced and detected.

2) The direction of the current depends on the sign of change of field, when magnets enters in the field increases and produce current in one direction , if the magnet was pulled out then field decreases and current produced in opposite direciton

3) the direction of current produced in wire due to magnetic field depends also on the polarity of the magnet and , the current produced by north pole for certain moment is simply opposite direction to the current produced by south pole for the same moment .ex moving noth pole in is exatly equal to moving south pole out. or moving south pole in produce current in same direction as moving north pole out

4) The faster the mangetic field changed near galvanometer the larger the curreent produced , as discussed current produced is in praportional to change of field.