Answer to Question #66855 in Electromagnetism for Chelsea
and an ammeter. I know that if I run a current through the wires I can balance the
downward force of gravity on the top wire with the repulsive magnetic force between
them. I know the weight per unit length of the wires is 0.15 N/m. I can use the power
supply and the ammeter to choose the current (assumed to be the same current in
each wire). What value of current should I choose to make the distance between the
two wires equal to exactly 1.00 cm? Note that these are parallel wires and not a single
wire in an external magnetic field.
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