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Is Ohm's law universally applicable for ...

Is Ohm's law universally applicable for all condcuting elements? If not, give examples of elements which do not obey Ohm's law.

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No. Examples of non-ohmic elements, vacuum diode, semiconductor diode.
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AAKASH SERIES-CURRENT ELECTRICITY-EXERCISE (VERY ANSWER QUESTIONS)
  1. What is the temperature coefficient?

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  2. Is Ohm's law a fundamental law?

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  3. What is a primary cell? Give an example.

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  4. What is the terminal voltage of a cell ? When it will be equal to the ...

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  5. When a cell is charged by sending current into the cell, what will be ...

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  6. What are good conductors? Give examples.

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  7. Which of the two, namely voltmeter and potentiometer is preferable to ...

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  8. Define kilowatt hour.How is it reltated to joule?

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  9. On what conservation principles the first and the second laws of Kirch...

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  10. What is the advantage of a meter bridge over a Wheatstone bridge?

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  11. What is the principle of potentiometer?

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  12. When is the series combination of cells advantageous and why?

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  13. When is the parallel combination of cells advantageous and why?

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  14. What are the advantages of using a potentiometer?

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  15. "Electrons alone are the current carriers in conductors". Explain whet...

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  16. What conclusion can you draw from the following observation on a resis...

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  17. A steady current flows in a metallic conductor of non-uniform cross-se...

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  18. Is Ohm's law universally applicable for all condcuting elements? If no...

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  19. A low voltage supply from which one needs high currents must have very...

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  20. A high tension (HT) supply of, say, 6kV must have a very large interna...

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