Resistivity of potentiometer wire is 10 –7 ohm-meter and its area of cross-section is 10 –6 m 2 . When a current i = 0.1A flows through the wire, its potential gradient is:
Text Solution
Verified by ExpertsThe correct answer is:
A
Potential gradient of a wire equal to potential fall per unit length.
Potential gradient =Potential fall per unit length
= Current × Resistance per unit length 
But 
∴ Potential gradient 
Неге, 
Hence, potential gradient 
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