Ohm's law
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)
or, V~ I
or, V = R × I
Where R is a constant called " resistance'' of the conductor.
The SI unit of resistance is ohm.
The value of this constant depends on the nature, length,are a of cross - section and temperature of the conductor.
V
Resistance R = --------
I
The above equation is a mathematical expression of 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)
or, V~ I
or, V = R × I
Where R is a constant called " resistance'' of the conductor.
The SI unit of resistance is ohm.
The value of this constant depends on the nature, length,are a of cross - section and temperature of the conductor.
V
Resistance R = --------
I
The above equation is a mathematical expression of Ohm's law.
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