Question

Lab: Electromagnetic Induction and Transformers

1) Rotate the coil in the elctric motor. Does the needle of the galvanometer move? Which direction?

2) Rotate the coil in the electric motor int he opposite direction. How does this affect the needle of the galvanometer?

3) Explain why the need deflects when the coil in the electric motor rotates?

Answer 1

1)

if the coil in the electric motor will rotate in the presence of magnetic field.

needle of the galvanometer will move or gets deflection, and this

then, currnet induces in the coil it always to decrease the rotation of the coil

2)

again,

needle gets defletion in oppsite dierction comparision to part (1)

here also, current in galvonometer is proportional to the deflection,

this induced curent will oppose the roatation of the coil

needle in the coil gets deflection, it

3)

when the coil in the motor rotates,

then change in magnetic flux will give the currnet ,

this currnet is proportional to delection