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smolie04 smolie04
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Posts: 291
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5 years ago
When a potential difference is applied across a piece of wire made of metal A, a current flows.  If the metal-A wire is replaced with a wire made of metal B having twice the diameter of the metal-A wire, how much current will flow through the metal-B wire? The lengths of both wires are the same, and the voltage difference remains unchanged. The resistivity of metal A is 1.68 × 10-8 Ω ∙ m, and the resistivity of metal B is 1.59 × 10-8 Ω ∙ m.

• 19 mA

• 21 mA

• 5.3 mA

• 11 mA
Textbook 
College Physics: A Strategic Approach

College Physics: A Strategic Approach


Edition: 3rd
Authors:
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Replies
wrote...
5 years ago
21 mA
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