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प्रश्न
Two resistors A and B have resistances RA and RB, respectively, and RA < RB. The resistivities of their materials are ρA and ρB.
पर्याय
ρA > ρB
ρA = ρB
ρA < ρB
The information is not sufficient to find the relation between ρA and ρB
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उत्तर
The information is not sufficient to find the relation between ρA and ρB
The resistance R of a conductor depends on its resistivity ρ, length l and cross-sectional area A. Thus,
\[R = \rho\frac{l}{A}\]
From the given comparison of resistances, we cannot derive the correct relation between the resistances. We also need to know the cross-sectional areas and the lengths of both the conductors before concluding about their resistivities. Only then can the relation between the resistivities be found.
The information is not sufficient to find the relation between ρA and ρB.
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What conclusion can you draw from the following observations on a resistor made of alloy manganin?
| Current A |
Voltage V |
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| 0.6 | 11.8 | 5.0 | 98.6 |
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