Question

A material has a resistivity of 5 ohm m. The potential difference across the material was increased by a factor of 10. What is the new resistivity?

• A. 5 ohm m
• B. 50 ohm m
• C. 500 ohm m
• D. 0.5 ohm m

Answer 1

The correct option is A 5 ohm m


Resistivity is a property of the material. That’s what I was trying to convey through that hint. Potential difference across a conductor may change its current but can’t change its resistivity.
BTW just that you should know: there are some factors which alter the basic nature of a material and may change such “intrinsic” or “Intensive” property. For example, temperature but potential difference, surely not.