The plot of current $$I~\text{(A)}$$ flowing through a metallic conductor versus the applied voltage $$V~\text{(volt)}$$ across the ends of a conductor is:

 1 2 3 4
Subtopic: Â Derivation of Ohm's Law |
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A certain wire $$A$$ has resistance $$81$$ $$\Omega$$. The resistance of another wire $$B$$ of the same material and equal length but of diameter thrice the diameter of $$A$$ will be:
 1 $$81$$ $$\Omega$$ 2 $$9$$ $$\Omega$$ 3 $$729$$ $$\Omega$$ 4 $$243$$ $$\Omega$$
Subtopic: Â Derivation of Ohm's Law |
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From NCERT
NEET - 2023
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On the basis of electrical conductivity, which one of the following material has the smallest resistivity?
1. Germanium
2. Silver
3. Glass
4. Silicon
Subtopic: Â Derivation of Ohm's Law |
Â 62%
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NEET - 2023
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As the temperature of a metallic resistor is increased, the product of its resistivity and conductivity:

 1 increases 2 decreases 3 remains constant 4 may increase or decrease
Subtopic: Â Derivation of Ohm's Law |
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The reciprocal of resistance is:
 1 reactance 2 mobility 3 conductivity 4 conductance
Subtopic: Â Derivation of Ohm's Law |
Â 79%
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NEET - 2022
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The resistance of platinum wire at $$0^{\circ} \text{C}$$ is $$2~ \Omega$$ and $$6.8~ \Omega$$ at $$80^{\circ}\text{C}$$. The temperature coefficient of resistance of the wire is:
 1 $$(3\times 10^{-1})^\circ \text{C}^{-1}$$ 2 $$(3 \times 10^{-4})^\circ \text{C}^{-1}$$ 3 $$(3 \times 10^{-3})^\circ \text{C}^{-1}$$ 4 $$(3 \times 10^{-2})^\circ \text{C}^{-1}$$
Subtopic: Â Derivation of Ohm's Law |
Â 67%
From NCERT
NEET - 2023