Magnetic fields produced by the current in two parallel wires interact with each other: the field produced by one wire exerts a force on the charges flowing in the other wire (which also create a magnetic field). a) Do two parallel current carrying wires attract or repel each other when their currents flow (I) in the same, and (II) in the opposite direction? Explain and make a scheme. b) What do you think happens to
Magnetic fields produced by the current in two parallel wires interact with each other: the field produced by one wire exerts a force on the charges flowing in the other wire (which also create a magnetic field). a) Do two parallel current carrying wires attract or repel each other when their currents flow (I) in the same, and (II) in the opposite direction? Explain and make a scheme. b) What do you think happens to a thick wire carrying a large current - does it tend to expand or compress? Why?
Hint to (a): You can also think about the field lines of two permanent magnets which attract or repel each other - how are their fieldlines oriented relative to each other? Which orientation causes an attractive, which a repulsive force?
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