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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

A potential difference of 12 V is found to produce a current of 0.40 A in a 3.2-m length of wire with a uniform radius of 0.40 cm. What is (a) the resistance of the wire? (b) The resistivity of the wire?

(a)

To determine
The resistance of the wire.

Explanation

Given Info: The wire has radius 0.40cm and length 3.2m . The potential difference across the ends of wire is 12V and current flows through wire is 0.40A

Explanation:

Formula to calculate the resistance of wire is,

R=ΔVI

  • R is the resistance of wire,
  • V is the potential difference across the ends of wire,
  • I

(b)

To determine
The resistivity of the wire.

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