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Fig. shows I-V curves for two resistors....

Fig. shows I-V curves for two resistors. Identify the ohmic and non-ohmic resistors. Give a reason for your answer

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ohmic - (b), non-ohmic - (a) Reason: For (b), I-V graph is a straight line, while for (a), the graph is a curve.
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ICSE-CURRENT ELECTRICITY-EXERCISE-8(A)
  1. What is an ohmic resistor ? Give one example of an ohmic resistor. Dra...

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  2. Give two differences between an ohmic and non ohmic resistor.

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  3. Fig. shows I-V curves for two resistors. Identify the ohmic and non-oh...

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  4. Draw a V-I graph for a conductor at two different temperatures. What c...

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  5. How does the resistance of a wire depend on its radius? Explain your a...

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  6. Two copper wires are of the same length, but one is thicker than the o...

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  7. How does the resistance of a wire depend on its length ? Give a reason...

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  8. How does the resistivity of a consuctor depend upon temperature and el...

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  9. Two wires, one of copper and the other of iron, are of the same length...

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  10. Name three factors on which resistance of a given wire depends and sta...

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  11. Define the term "specific resistance and state its S.I. unit.

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  12. Write an expression connecting the resistance of a wire and specific r...

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  13. State the order of specific resistance of a metal,

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  14. State the order of specific resistance of a semiconductor

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  15. State the order of specific resistance of an insulator

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  16. (a) Name two factors on which the specific resistance of a wire depend...

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  17. Name a substance of which the specific resistance remains almost uncha...

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  18. How does the specific resistance of a semi-conductor change with the i...

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  19. How does (a) resistance, and (b) specific resistance of a wire depend ...

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  20. Name the material used for making connection wires. Give a reason for ...

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