Which of the following factors directly affects the resistance of a conductor?
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A.
Length of the conductor
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B.
Power of the conductor
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C.
Voltage across the conductor
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D.
Current through the conductor
Correct Answer:
A. Length of the conductor
Explanation:
The correct answer is Option A: Length of the conductor.
The electrical resistance of a conductor is determined by its physical characteristics and environmental conditions. According to the laws of resistance, the resistance (R) is directly proportional to the length (L) of the conductor; as the length increases, electrons encounter more collisions with atoms, thereby increasing resistance. Other primary factors include the cross-sectional area (where resistance is inversely proportional to the area), the nature of the material (resistivity), and the temperature. While voltage and current are used to calculate resistance via Ohm's Law (R=V/I), they are external circuit parameters rather than intrinsic factors that physically change the conductor's inherent resistance. Power is a measure of energy dissipation resulting from resistance and current, rather than a factor that determines resistance itself.
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