Two high-current transmission lines carry currents of 26.0 A and 71.0 A in the same direction and are suspended parallel to each other 41.0 cm apart.
Part A. If the vertical posts supporting these wires divide the lines into straight 19.0 m segments, what magnetic force does each segment exert on the other? (in Newtons)
Part B. Is the force found in part (A) attractive or repulsive?
A solenoid contains 750coils of very thin wire evenly wrapped over a length of 15.0 cm. Each coil is 2.50 cm in diameter.
If this solenoid carries a current of 7.35A , what is the magnetic field at its center?