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Show that equivalent resistance in paral...

Show that equivalent resistance in parallel combination is always less than each of the individual resistances connected in the combination.

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MODERN PUBLICATION-CURRENT ELECTRICITY-REVISION EXERCISES (VERY SHORT ANSWER QUESTIONS)
  1. A wire of resistivity is stretched to double its length. What will be...

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  2. Two wires of equal length one of copper and other of manganin have the...

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  3. Show that equivalent resistance in parallel combination is always less...

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  4. Draw a graph to show the variation of resistance of a metal wire as a ...

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  5. Define the term electrical conductivity of a metallic wire. Write its ...

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  6. EMF of an electrical cell is 2 volt. A 10 Omega resistance is joined a...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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