Explanation Given: Originally the copper wire is at 20°C and resistance is to be raised by 12%. It is also known that for copper, the temperature coefficient of resistance is 0.004 per °C. Formula used: •The resistance ( R t ) at temperature t ° C is correlated to the reference temperature t 0 ° C and the resistance at that temperature ( R t 0 ) as, R t = R t 0 [ 1 + α ( t − t 0 ) ] Where, α is the temperature coefficient of resistance of the given material Calculation: As it is given that the later resistance is 12% more than the initial one, therefore R t = R t 0 + R t 0 × 12 100 = 1...

7th Edition

ISBN: 2818440071355

Author: GIANCOLI

Publisher: PEARSON

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Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting …

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Chapter 18, Problem 21P

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The increase in temperature of a copper wire to increase its resistance by 12%

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Chapter 18, Problem 20P

Chapter 18, Problem 22P

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