Two high-current transmission lines carry currents of 260 a, Ask an Expert

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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?

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