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For metal conductors, the electrical res...

For metal conductors, the electrical resistivity decreases with the rise in temperature.Is it true?

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Name three materials whose resistivity decreases with rise in temperature .

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MODERN PUBLICATION-CURRENT ELECTRICITY-REVISION EXERCISES (VERY SHORT ANSWER QUESTIONS)
  1. How does the conductivity of a metallic conductor vary with temperatur...

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  2. Discuss the effect of temperature on the resistance of (i) metals (ii)...

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  3. For metal conductors, the electrical resistivity decreases with the ri...

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  4. Out of copper and nichrome, which has the larger value of temperature ...

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  5. Two wires P and Q of same diameter and same length are joined in paral...

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  6. The graph given below shows the variation of resistance of mercury in ...

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  7. Of metals and alloys, which has greater value of temperature co-effici...

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  8. Plot a graph showing variation of current versus voltage for the mater...

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  9. A student obtains resistances 3, 4, 12 and 16 Ohm using only two metal...

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  10. Two students A and B were asked to pick a resistor of 15 k Omega from ...

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  11. A wire of resistance 5Omega is drawn out so that its length is increas...

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  12. What is the largest voltage you can safely put across a resistor marke...

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  13. Two conductors, one having resistance R and another 3R are connected i...

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  14. Out of the two bubls marked 25W and 100W, which one has the higher res...

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  15. A 150W and a 600W bulbs are joined in parallel to the mains. Out of th...

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  16. Write two special characteristics a wire of electric heater should hav...

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  17. The emf of a cell is always greater than its terminal voltage. Why? Gi...

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  18. Name the device used for measuring the internal resistance of a second...

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  19. Given three resistors of resistances 1 Omega, 2Omega and 3Omega. How w...

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  20. The plot of the variation of potential difference across a combination...

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