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what happens to the resistance of a conductor when (a) length is doubled  (b) area is doubled (c) length doubled and area is halved  (d) radius is doubled (e) diameteris doubled
Asked by vamsi14102003 | 22 May, 2018, 10:58: AM
The resistance of conductor (wire) R is given by,

a) If length is doubled

If length is doubled resistance is doubled.

b) Area is doubled
If area is doubled, resistance gets halved.

c) If length is doubled and area is halved
If length is doubled and area is halved, resistance is 4 times that of original resistance

Thus, if radius is doubled , resistance becomes 1/4 times the original

e) Diameter is doubled

If diameter is doubled, resistance becomes 1/4 times the original resistance.
Answered by Shiwani Sawant | 22 May, 2018, 12:13: PM

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