Presence of even very minute amount (say 0.1%) of ______________ in copper, reduces its electrical conductivity very seriously?
Correct answer: D. Both B. and C.
- A. Bismuth
- B. Arsenic
- C. Antimony
- D. Both B. and C.
Explanation
Arsenic and antimony dissolve in copper and strongly scatter conduction electrons, causing a large fall in electrical conductivity even at about 0.1%. Hence both impurities named in options B and C are responsible.
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