Two copper wires of lengths 
and 
have radii 
and 
respectively. What is ratio of their specific resistances?
a)
1 : 2
b)
2 : 1
c)
1 : 1
d)
1 : 3
Two copper wires of lengths and have radii and respectively. What is ratio of their specific resistances?
a)
1 : 2
b)
2 : 1
c)
1 : 1
d)
1 : 3
Question ID - 150305 | SaraNextGen Answer
Two copper wires of lengths and have radii and respectively. What is ratio of their specific resistances?
a)
1 : 2
b)
2 : 1
c)
1 : 1
d)
1 : 3
|
Two copper wires of lengths |
|||||||
|
a) |
1 : 2 |
b) |
2 : 1 |
c) |
1 : 1 |
d) |
1 : 3 |
1 Answer - 5876 Votes
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Answer Key : (c) -
Answer Link|
(c) The specific resistance ( |
) is the characteristic of the material of conductor. Its value depends only on the material of conductor and its temperature. Its value does not depend on the length and area of cross-section of the conductor.