A) length \[=\text{ }L\] and area \[=\text{ }A\]
B) length = \[\frac{L}{2}\] and area \[=\text{ }2A\]
C) length \[=\text{ }2L\] and area = \[\frac{A}{2}\]
D) All have the same resistance, as the amount of the metal is the same
Correct Answer: C
Solution :
Resistance, \[R=\rho \frac{l}{A}\] \[R\propto l\propto \frac{1}{A}\] \[\therefore \] R is maximum when length = 2L and area \[=\frac{A}{2}\].You need to login to perform this action.
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