True False-two long current carrying wires?

[sona1177]

Homework Statement

Consider two long current-carrying wires (A and B) that are parallel to each other. Which of the following statements are true about the force between these two wires?
if the current in wire A increases, then the force on wire A will stay the same, but the force on wire B will increase
if the wires are brought closer together, the force between them will increase
if the currents are in the same direction, then the wires will attract each other
if the current goes to zero in wire A, then wire B will still feel a force, but wire A will not feel a force
if the currents are in opposite directions, then the wires will attract each other
if the current goes to zero in wire A, both wires will no longer feel a force

Homework Equations

answers:
false
true
true
false
false
false

I can't really figure out what is wrong. can someone please help?

The Attempt at a Solution

 

[supratim1]

Hi Sona.

the first statement is true. force on each wire is equal in magnitude and opposite in direction. it is a mutually felt force.

 

[supratim1]

the last statement is true, for same reason as above.