A very long wire lies in a plane with a short wire segment. The long
wire carries current I, while the short wire of length L carries current
i. The two wires are parallel to each other. Which of the following
statements are true?

1. The direction of the magnetic force
   exerted by the long wire on the short wire is directed away from the
   long wire.
2. The magnitude of the force on the short wire is
   μ₀IiL/2πd.
3. The long wire experiences a force
   of exactly the same magnitude as the force experienced by the short
   wire.

1. A only
2. B only
3. C only
4. A and B
5. A and C
6. B and C
7. A, B, and C
8. None of them are true