We are given three copper wires of different lengths and different areas of cross-section. Which one of the following would have highest resistivity?

Which of the following statements are correct about the electrical resistance and resistivity of a wire? 1. Both quantities depend on the area of cross-section of the wire 2. Both depend on the tempe…

Which one of the following correctly represents the SI unit of resistivity?

If the length of a copper wire is increased by twice, then its resistivity will be

Which one of the following laws of electromagnetism does not give the direction of magnetic field ?

A metal wire of length I and diameter d has a resistance R. What would be the resistance of another wire of the same metal and of same length but having double the diameter?