A small coll is intorduced  between the poles  of an electromagnent  so that  its axis coincides  w
Channel: Doubtnut
Date: 23/08/2020

A small coll is intorduced  between the poles  of an electromagnent  so that  its axis coincides  with the  magnetic  field direction. The cross  sectional ara of the  coil is equal to `S = 30 mm^(2)`, the  its diameter  a balistic  galvanometer connected  to the  coil  indicates  a charge `q = 4.5 muC` flowing   through  it. Find  the magnetic  induction magnitude  between  the poles provided  the total  resistance of the electric  circuit  equals `R = 40 Omega`