Three Coplanar Parallel Straight Wires Carry Equal Currents I to the Right

question 106

Multiple Choice

Three coplanar parallel straight wires carry equal currents I to the right as shown below.Each pair of wires is a distance a apart.The direction of the magnetic force on the middle wire

• A)is up out of the plane of the wires.
• B)is down into the plane of the wires.
• C)is in the plane of the wires,directed upwards.
• D)is in the plane of the wires,directed downwards
• E)cannot be defined,because there is no magnetic force on the middle wire.

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