there r 2 metallic wire of same thickness made frm iron and silver if length of iron wire which is equal to the resistance to iron of wire. Data:1. resistivity of iron= 10×10`-8ohm m. 2._resistivity of silver =16×10-8ohm m( brainly person answer)
Answers
Answer:
0.075 m.
Explanation:
We know that the formulae of the resistance is given by R=pl/A, where we know that the p being the material's resistivity, resistance is R, cross-sectional area is A and the wire's length is L. The resistance of material is directly proportional to the length L. For different material the values of the resistance and resistivity with length will change.
In the question it is given that the cross-sectional area will be same, so for the two materials if we equate the value of the resistance we will get that (p1)(L1)/A=(p2)(L2)/A.
L2 = р1*L1/p2. So, on substituting the values we will get that (10*10^-8/16*10^-8)-*12. Which on solving we will get the value of the L2 as 0.075 m.
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