One long straight wire is to be held directly above another by repulsion between their currents. The

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One long straight wire is to be held directly above another by repulsion between their currents. The lower wire carries 100 A and the wire 7.50 cm above it is 10-gauge (2.588 mm diameter) copper wire.

(a) What current must flow in the upper wire, neglecting the Earth's field?

(b) What is the smallest current if the Earth's 3.00 x 10^-5 T field is parallel to the ground and is not neglected?

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College Physics

ISBN: 9781711470832

2nd Edition

Authors: OpenStax

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Question Posted: Nov 26, 2023 12:18 AM

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One long straight wire is to be held directly above another by repulsion between their currents. The

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a To calculate the current required in the upper wire we can use Amperes law B I 2 r Where B is the magnetic field unknown is the permeability of free ...View the full answer

College Physics

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