The resistance of the wire varies inversely as:
Correct answer: A. Area of cross section
- A. Area of cross section
- B. length
- C. Resistivity
- D. Temperature
Explanation
The resistance of a wire does inversely with the area of cross-sectional ,according to the formula: R = ρ * (L/A), where R is resistance, ρ is resistivity, L is length, and A is the cross-sectional area.Correct answer is A.
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Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.
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