Two resistors A and B have resistances RA and RB, respectively, and RA < RB. The resistivities of their materials are rhoA and rhoB.
(a) rhoA > rhoB
(b) rhoA = rhoB
(c) rhoA < rhoB
(d) The information is not sufficient to find the relation between rhoA and rhoB.
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The information is not sufficient to find the relation between rhoA and rhoB.
Explanation:
- The resistance of any conductor is depends on its resistivity (rho), length (l) and cross –sectional area (A)
- We can represent the above relation in equation as R = rho l/A
- From the above information we cannot find out the correct relation between resistances because we need to require the cross sectional area and length of the conductors.
- By having all those information we can calculate the relation between the resistivity.
- Hence, we conclude that information is not sufficient to find the relation between rhoA and rhoB.
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