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On increasing the temperature of a condu...

On increasing the temperature of a conductor the product of its resistivity `(rho)` and conductivity `(sigma) `will ....... .

A

increase

B

decrease

C

remain constant

D

may increase or decrease

Text Solution

Verified by Experts

The correct Answer is:
C
remain constant
`rho sigma = rho xx (1)/(rho) = 1 `
`therefore `Which remains constant
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KUMAR PRAKASHAN-CURRENT ELECTRICITY-SECTION [D] MULTIPLE CHOICE QUESTIONS (MCQs) (MCQs FROM .DARPAN. BASED ON TEXTBOOK)
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  2. J = sigma E represents ........ .

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  3. On increasing the temperature of a conductor the product of its resist...

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  4. When the temperature of a conductor increase the ratio of its resistiv...

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  5. Two wires of equal lengths one of copper and other of manganin have th...

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  6. Two wires are made up of same material. Ratio of their masses is 1 : 2...

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  7. A resistive wire is stretched till its length is increased by 100%. Du...

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  8. A circle of 2.5 meter radius is made using a wire of uniform cross sec...

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  9. A solenoid has 50 turns and radius 2 cm, diameter of wire is 2x 10^(-4...

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  10. Resistance or coil at 100^(@)C is 4.2 Omega. If temperature co-efficie...

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  11. Resistance of a wire is ROmega. It is stretched uniformly till Its len...

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  12. Resistivity of ideal conductor and ideal insulator are rho(1) and rho...

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  13. For a conductor, the given Ogure shows the graph of V rarr I for diff...

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  14. For a conducting wire V rarr I graph is as shown in figure given belo...

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  15. Free electron number density in one wire is n, its area of cross-secti...

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  16. A wire has a non-uniform cross-section ai shown In figure. A steady cu...

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  17. Drift velocity of electrons is ....... .

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  18. The arc of cross-section of a metallic conductor is halved. The drift ...

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  19. Drift velocity of holes is ......

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  20. Suppose drift velocity over the entire cross section of a wire is V (...

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