A copper wire and an iron wire have the same length and thickness. Which wire will have lower resistance and why, when both are kept at the same temperature?

Question

A copper wire and an iron wire have the same length and thickness. Which wire will have lower resistance and why, when both are kept at the same temperature? — Exam MCQ

rrbjepyq.in · Accepted Answer

A. The copper wire, because copper is a better conductor — The correct choice is The copper wire, because copper is a better conductor. It follows from the basic electrical relationship between voltage, current, resistance, charge or electrical energy described in the question.

rrbjepyq.in · Answer

B. The iron wire, because iron is a better conductor

rrbjepyq.in · Answer

C. Both wires, because thickness is the only factor

rrbjepyq.in · Answer

D. Both wires, because material does not affect resistance

A copper wire and an iron wire have the same length and thickness. Which wire will have lower resistance and why, when both are kept at the same temperature?

📚 Related Questions — Electricity