state Ohm's law analyse the graph calculate the resistance what are the factors on which the resistance of a conductor depends
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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.
Resistance of a conductor directly depends upon Length of the wire L Inversely depends upon Area of Cross section of the conductor 1/A Nature of material used. Therefore, R=ρ L/A Length of the conductor is double, means you are stretching that given length to double it. As a result, the wire becomes thin due to stretching. So its area of cross section will be halved(Since the volume remains constant). So new resistance RN = ρ 2L/A/2 = 4. ρ.L/A =4R Hence the new resistance will become 4 times.
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ANSWER:
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Ohm's law : If the physical conditions of the conductor remains same, the current flowing through it is directly proportional to the potential difference.
The factors on which the resistance of a conductor depends:
1) Thickness of the conductor
2) Resistance
3) Temperature
4) Length of wire
5) Area of cross section
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