Consider two parallel wires carrying current in opposite directions. Which one of the following statements to true concerning this situation?
a) The two wires will attract each other, even if no external magnetic field is applied to the wires.
b) The two wires will repel each other, even if no external magnetic field is applied to the wires.
c) The two wires will attract each other, only if an external magnetic field is applied to the wires.
d) The two wires will repel each other, only if an external magnetic field is applied to the wires.
e) The wires will be neither attracted nor repelled from each other when no external magnetic field is applied to the wires.
Ans: b) The two wires will repel each other, even if no external magnetic field is applied to the wires.
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