Question

Four very long, current-carrying wires in the same plane intersect to form a square with side lengths of 45.0 cm, as shown in the figure blelow.

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asked 2021-01-04

Four very long, current-carrying wires in the same plane intersect to form a square with side lengths of 45.0 cm, as shown in the figure blelow. The currents running through the wires are 8.0 A, 20.0 A, 10.0 A, and I.
image
Part A
Find the magnitude of the current I that will make the magnetic field at the center of the square equal to zero.
Part B
What is the direction of the current I (up or down)?

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2021-01-05

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