the electric resistance of a certain wire of iron os R if its length and radius are doubled
Answers
Answer:
If its length and radius are both doulbed, then. Therefore, resistance will be halved. Now the specific resistance of the wire does not depend on the geometry of the wire hence, it remains unchanged.
Step-by-step explanation:
(a) The resistance will be doubled and the specific resistance will be halved.
(b) The resistance will be halved and the specific resistance will remain unchanged.
(c ) The resistance will be halved and the specific resistance will be doubled.
(d) The resistance and the specific resistance, will both remain unchanged.
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Step-by-step explanation:
R=
A
pl
=
πr
2
pl
R
′
=
π(2r)
2
p2l
=
2
R
Specific resistance will remain same as it is a material property but remember it depends on temperature