Homework Help: physics

Posted by Jason on Monday, March 22, 2010 at 7:01pm.

Two parallel wires which carry currents I1 = 69 A and I2. The top wire is held in position, the bottom wire is prevented from moving sideways but can slide up and down without friction. If the wires have a mass of 5.3 g per metre of length calculate current I2 such that the lower wire levitates at a position 4.8 cm below the top wire.

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