NEET Physics Resistance & Resistivity MCQ Question
Which of the following statements about resistance and resistivity is correct?
Resistance is directly proportional to the length of the conductor and inversely proportional to its cross-sectional area.
Resistivity is a measure of the potential difference across a conductor.
Higher resistivity materials always lead to more current flow in a circuit.
Resistance decreases with increasing temperature for all conductors.
Correct Answer
Detailed Explanation
Resistance is defined as R = ρl/A, where R is resistance, ρ is resistivity, l is the length of the conductor, and A is the cross-sectional area, clearly establishing the proportional relationships stated in option A.
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