Each of the diagrams in Fig 6 represents two current-carrying conductors situated close to each other. In which two diagrams are the forces between the two wires attractive?
Attached Figure / Diagram
A
I and V
B
I and III
C
II and IV
D
II and V
E
III and IV
Verified Correct Answer: B.
Physical Principles & Numerical Solution
Two current-carrying conductors attract each other when the current is in the same direction and repel each other when the current is in the opposite direction. This can be verified using Fleming's left-hand rule.
Source: Myschool Past Questions Archive (Record #41639)