Question

10.
Two long parallel wires cany i and 2i current in same direction. Magnetic field just between the wires
is B:. If 2i current is switched off then magnetic field at the same point is :-
(1) 2B
can
(2) B
(3) B/2
(4) V2 B​

Answer 1

Answer:

option (2) B is correct answer

Explanation:

Hi !

resultant initially =2B- B = B

after switched off => M F = B