Question

Describe ohm's law how to do and precaution

Answer 1

According to the law of Georg Simon Ohm in 1827 in which the potential difference is directly propotional tothe current flowing in wire, when other physical quantities are constant

Answer 2

Explanation:

Ohm's law .

→ Ohm's law gives a relationship between current and potential difference .

→ According to Ohm's law : At constant temperature , the current flowing through a conductor is directly proportional to the potential difference across its end .

→ If I is the current flowing through a conductor and V is the potential difference ( or voltage ) across its ends , then according to Ohm's law :

I∝V ( At constant temperature ) .

This can also be written as : V∝I

Or V = R × I .

Where R is a constant called “resistance” of the conductor .

★ Resistance of a conductor : The property of a conductor due to which it opposes the flow of current through it is called resistance .

→ The resistance of a conductor depends on length, thickness, nature of material and temperature of the conductor.

→ The SI unit of resistance is ohm( Ω ) .