NEET Physics Resistance & Resistivity MCQ Question
Which of the following combinations regarding resistance and resistivity in electric circuits is correct?
Resistance increases with length and decreases with cross-sectional area.
Resistivity is affected by the material's temperature but not its dimensions.
Resistance is directly proportional to the voltage across a conductor.
Resistivity is a measure of how much a material opposes the flow of current regardless of temperature effects.
Correct Answer
Detailed Explanation
According to the relationships defined in the NCERT context, resistance is indeed directly proportional to length and inversely proportional to cross-sectional area, making option A correct. Resistivity is a material constant affected by temperature, not just dimensions, which makes option B incorrect.
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