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Discuss the effect of temperature on the...

Discuss the effect of temperature on the resistance of (i) metals (ii) semiconductors and (iii) insulators.

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MODERN PUBLICATION-CURRENT ELECTRICITY-REVISION EXERCISES (VERY SHORT ANSWER QUESTIONS)
  1. EMF of an electrical cell is 2 volt. A 10 Omega resistance is joined a...

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  2. How does the conductivity of a metallic conductor vary with temperatur...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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