Consider twosections of wires with currents as shown above.
The force on the short wire due to the long wire is toward theright.
The forceon the short wire due to the long wire is upward.
The forceon the short wire due to the long wire points into the page.
The magnetic field of the long wire points to the right at the location of the short wire.
The magnetic field of the long wire points to the left at the location of the short wire.
Which ones are true?