Question

6. State Ohm’s law. Write the necessary conditions for its validity. How is this law verified experimentally?

What will be the nature of graph between potential difference and current for a conductor? Name the

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Answer 1

➡️Ohms Law :

The current flowing through the conductor is directly propotional to the potential difference applied across the ends and provided temperature and other physical conditions reamians constant.

$i \: \alpha \: v$

V= I R

R is constant propotionalty called resistance.

➡️Necessary conditions :

✴️ Applied to only good conductor.

✴️Do not applicable for semiconductor and vacuum tubes

✴️Ohms Law only applicable when temperatures and other physical conditions reamians constant.

✴️Ohms Law do not applicable for low temperatures and very high temperatures.

➡️Nature of graph in Ohms Law:

The nature of the graph will be straight line.

Because current is directly propotional to the potential difference

$i \: \: \alpha \: \: v$

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