Distinguish between Ohmic and non-Ohmic substances;explain with the help of example.
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Answer:
Olympic-1. Substances which obey ohm's law are called ohmic substances
non-olympic- 1. Substances which do not obey ohm's law are called non-ohmic substances
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Ohmic substance:
Which substances are obeys ohms law , those substances are called as “ohmic sunstances".
In this substances current is directly proportional to the voltage .
Examples: copper wire , aluminium
Non ohmic substances:
Which substances do not obeys ohms ias, those are called it as “non ohmic substances"
Examples:transistors, vaccum tubes .
Differences:
In ohmic substances , voltage and current graph is linear , in non ohmic substances the graph is not a straight line.
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