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need asap ty will upvote Consider 1 cm lengths of metal wire with diameter d making contact. Derive an expression for the ratio of the

need asap ty will upvote

Consider 1 cm lengths of metal wire with diameter d making contact.

Derive an expression for the ratio of the constriction resistance to total resistance if contact is made through a circular area of radius a.

For a 1 mm diameter Cu wire, what value of a is required for the constriction resistance to reach a value of 10 milliohm?

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