Question
Physics Question on Electric Potential And Potential Difference
The electric resistance of a certain wire of iron is R. If its length and radius are both doubled then
A
The resistance will be halved and the specific resistance will remain unchanged
B
The resistance will be halved and the specific resistance will be doubled
C
The resistance and the specific resistance, will both remain unchanged
D
The resistance will be doubled and the specific resistance will be halved
Answer
The resistance will be halved and the specific resistance will remain unchanged
Explanation
Solution
When the length and radius of a wire of iron are both doubled, the resistance will be halved, and the specific resistance will remain unchanged.