Tue June 07, 2011 By: Anita Singh

Why resistivity of alloy is much greater than the resistivity of metals forming the alloy.Also why magnin is used in lab as standard resistor?Explain

Expert Reply
Thu June 09, 2011
Alloys are usually stronger than pure metals as many pure metals are weak. Alloys often combine properties of different metals together e.g. resistance to corrosion (copper) and strength (iron). Pure metals tend to be softer than alloys, which are a mix of two or more metals, and therefore get dented, scratched, or broken more easily.

Ask the Expert