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1-What four physical factors affect the resistance of a wire? 2-A wire of uniform cross-section has...

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Physics

1-What four physical factors affect the resistance of a wire?
2-A wire of uniform cross-section has a resistance of R.What would be the resistance of a similar wire, made of the samematerial, but twice as long and of twice the diameter?
3- A block of carbon, 1.0 cm by 2.0 cm by 5.0 cm, has aresistance of 0.015 Ω between its two smaller faces. What is theresistivity of carbon?
4-What length of German silver wire, diameter 0.050 cm, isneeded to make a 28 Ω resistor, if the resistivity of German silveris 2.2 x 10-7 Ω.m?
5-What is the resistance of one kilometer of copper wire(copper resistivity is 1.68x10-8 Ω.m), with a diameter of 10cm.

Answer & Explanation Solved by verified expert
4.2 Ratings (561 Votes)
1 There are 4 different factors which affectresistanceThe type of material of which the wireresistor is madeThe length of the resistor Resistanceinreases with the length of the resistorThe thickness of the resistor    See Answer
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