Explain if temperature is increasing constantly then ohm's laws will violate
Answers
Answer:
No coz it is increasing constantly
ANSWER:
The ohm’s law works only at constant temperature because resistance is a constant in ohm’s law.
EXPLANATION:
According to ohm’s law, resistance acts as proportionality constant between voltage and current. But resistance also have a directly proportional relation to length of the sample and inversely proportional relation to the area of the sample. So for determining resistance also we need a proportionality constant which is resistivity.
So if we substitute the expression of resistance in ohm’s law then resistivity or specific resistance will act as proportionality constant between voltage and current. But it was also found that resistivity also depends on temperature, so the ohm’s law will not have any proportionality constant if the temperature is varied as on varying temperature the resistivity will also vary.
Thus it was concluded that any sample will obey ohm’s law if and only if the sample is maintained at constant temperature which will keep the resistivity constant so the voltage and current can be in a proportional relation in the sample with resistivity as the proportionality constant. Thus the ohm’s law violate when temperature is increased constantly.