State Ohm's law. Write the necessary condition 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 physical quantity that can be obtained from this graph.
State Ohm's law. Write the necessary condition 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 physical quantity that can be obtained from this graph.
Ohm’s law: When the physical conditions such as temperature etc. remain same, the current flowing through the conductor is directly proportional to the potential difference applied across the ends of the conductor, i.e.,
I ∝ V or V ∝ I
VI=Constant
V=IR
where R is the constant of proportionality and is called resistance of the wire.
The necessary condition for the validity of Ohm's Law is that physical condition such as the temperature of the conductor remains the same.
"Procedure"
V-I graph is a straight line passing through the origin of the graph as shown.
Conclusion : Straight line nature of the graph shows that the current is proportional to the potential difference. Hence, Ohm’s law was verified.
The nature of graph between potential difference and current for a conductor is a straight line.
The slope of the V-I graph gives the value of resistance of the conductor at the given temperature.
Ohm’s law: When the physical conditions such as temperature etc. remain same, the current flowing through the conductor is directly proportional to the potential difference applied across the ends of the conductor, i.e.,
I ∝ V or V ∝ I
VI=Constant
V=IR
where R is the constant of proportionality and is called resistance of the wire.
The necessary condition for the validity of Ohm's Law is that physical condition such as the temperature of the conductor remains the same.
"Procedure"
V-I graph is a straight line passing through the origin of the graph as shown.
Conclusion : Straight line nature of the graph shows that the current is proportional to the potential difference. Hence, Ohm’s law was verified.
The nature of graph between potential difference and current for a conductor is a straight line.
The slope of the V-I graph gives the value of resistance of the conductor at the given temperature.
