The resistivity of a wire is _ ohm-m if 0.75 A current flows through it by applying 1.5 V potential difference, take length and cross-sectional area as 5m and 2.5 x 10^-7 m^2.
Correct answer: A. 1 x 10^-7
- A. 1 x 10^-7
- B. 2.63 X 10^-8
- C. 19 X 10^-8
- D. 7.85 x 10^-8
Explanation
For resistivity , first we have to find out resistanceV = I RSo R = V / IR = 1.5 / 0.75R = 2 ohmsR = l / A = resistivity length / area = R A / l = 2 2.5 x 10-7 / 5 = 1 x 10-7 ohm-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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