Question

Draw the pattern of magnetic field lines through and around a current carrying loop of wire. Mark the directions of
(i) Electric current in the loop
(ii) magnetic field lines.
How would the strength of magnetic field due to current, carrying loop be affected if-
(a) radius of the loop is reduced to half its original value?
(b) strength of current through the loop is doubled?

Answer 1

(a) Strength of magnetic field is doubled or it increases if radius of the loop is reduced to half.
(b) Strength of magnetic field is doubled or it increases when strength of the current through the loop is doubled.