Q. If the resistivity of an alloy is $\rho'$ and that of constituent metal is $\rho$ then
A) $\rho$’> $\rho$
B) $\rho$’< $\rho$
C) $\rho^{'} = \ \rho$
D) There is no simple relation between$\ \rho$ and $\rho^{'}$
Explanation
(a) The resistivity of metal increases when it is converted into an alloy
$\therefore\ \rho^{'} > \rho$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.