Question 93Electricity/Electronics - QMED70% to pass
How does the resistance of a conductor vary?
AI Explanation
The correct answer is A) directly as its length and inversely as its cross-sectional area.
This is because the resistance of a conductor is directly proportional to its length and inversely proportional to its cross-sectional area, as described by Ohm's law. The formula for the resistance of a conductor is R = ρL/A, where R is the resistance, ρ is the resistivity of the material, L is the length of the conductor, and A is the cross-sectional area.
The other options are incorrect because they do not accurately describe the relationship between resistance, length, and cross-sectional area as defined by Ohm's law.
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