The copper wires whose masses are 8gm and 12 gm have lengths in the ratio 3:4. Find the ratio of their resistances.

Asked by Sanyukta Khetan | 25th May, 2012, 01:37: PM

Expert Answer:

the resistance of the wire depends on its length, area of cross section & resistivity of material
 
Resistance of wire is directly proportional to its length.
Resistance of wire does not depend upon its mass.
 
So resistance ratio will also be 3:4

Answered by  | 25th May, 2012, 03:15: PM

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