Question

define Ohm's lawwhat is its characteristics ​

Answer 1

Answer:

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Ohm's law :- Acc to this law the current(I) flowing through a conductor is directly proportional to the potential difference(V) .A across end of the conductor provided the physical condition remain same

$v = ri \\ r = v/i$

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Answer 2

Answer:

Ohm’s law states that the voltage or potential difference between two points is directly proportional to the current or electricity passing through the resistance, and inversely proportional to the resistance of the circuit. The formula for Ohm’s law is V=I/R.

Ohm’s law helps us in determining either voltage, current or impedance or resistance of a linear electric circuit when the other two quantities are known to us. It also makes power calculation simpler.

Limitations of ohms law

   Ohm’s law is not applicable to unilateral networks. Unilateral networks allow the current to flow in one direction. Such types of network consist elements like a diode, transistor, etc.

   Ohm’s law is also not applicable to non – linear elements. Non-linear elements are those which do not have current exactly proportional to the applied voltage that means the resistance value of those elements changes for different values of voltage and current. Examples of non – linear elements are the thyristor.

Explanation: