For a metallic wire, the ratio V/I (V = applied potential difference, I = current flowing)-
Text Solution
Verified by ExpertsThe correct answer is:
D
The resistance of a metallic wire at temperature 
is given by
where 
is coefficient of expansion
Hence, resistance of wire increases on increasing the temperature. Also, from Ohm's law, ratio of 
is equal to R ie, 
Hence, on mcreasmg the temperature the ratio 
increases.
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