Sl unit of resistivity is:
Correct answer: C. Ω-m
- A. Ω-m²
- B. (Ω-m)-1
- C. Ω-m
- D. (Ω-m)-2
Explanation
Resistivity (ρ) is defined by the formula R = ρL/A. Rearranging for ρ gives ρ = RA/L. The SI units are (Ω)(m²)/m, which simplifies to Ohm-meter (Ω·m).
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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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