Question

plz help me plz help me (C)​

Answer 1

F=BIL for long infinite wire B is u/4Π × 2i1/r( here u is permiability r is distance b/w two wire)

for current i2 of the other wire attraction isF= Bi2l,

F/l=Bi2 (putting B we get formula)

Answer 2

Answer:

hope it helps you

refer the attachment