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Question
Two resistor A and B have resistances RA and RB respectively with RA<RB. The resistivities of their materials are ρA and ρB. Then
Two resistor A and B have resistances RA and RB respectively with RA<RB. The resistivities of their materials are ρA and ρB. Then
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Solution
The correct option is B Information insufficient.
Resistance =ρ lA
from this relation we can understand that the resistance also depends on length and area of the conductor. because in question it is not given that area and length are constant or any dependence of them over resistance.
So we cannot deduce the values of resistivity directly from the values of the resistance. Hence correct option is D.
Resistance =ρ lA
from this relation we can understand that the resistance also depends on length and area of the conductor. because in question it is not given that area and length are constant or any dependence of them over resistance.
So we cannot deduce the values of resistivity directly from the values of the resistance. Hence correct option is D.
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