Question
Download Solution PDFChoose the CORRECT statement regarding Ohm’s law:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is The temperature must be constant for validation of this law.
CONCEPT:
- Ohm’s law: At constant temperature, the current flowing through a resistance is directly proportional to the potential difference across its end.
V = R I
Where V = the potential difference, R = resistance, and I = current flowing.
- Ohmic resistance: The resistance that follows ohm’s law is called ohmic resistance.
- All resistances don’t follow ohm’s law.
EXPLANATION:
- Since ohm’s law is only valid for constant temperature. If we change the temperature then the resistance of the conductor will change and that will change the relationship between current and potential difference. So statement 3 is correct and statement 1 is wrong. So option 3 is correct.
- It is only valid for ohmic resistance. So statement 2 is not correct.
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