The resistivity of a potentiometer wire is 40 × × 10 –8 Ω Ω m and its area of cross section is 8 × × 10 –6 m 2 . If 0.2 amp. Current is flowing through the wire, the potential gradient will be
Text Solution
Verified by ExpertsThe correct answer is:
A
Potential gradient 
Potential difference 
length 
as 
hence gradient 
Hence gradient 
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