Same chapter3 marksDifficulty: Medium
A metal crystallises in a body-centred cubic lattice with an edge length of 400 pm. Calculate the radius of the metal atom.
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3 marksDifficulty: Medium
Distinguish between n-type and p-type semiconductors in terms of doping.
Original Khojo Papers practice question — not from a past board paper.
Answer
An n-type semiconductor is made by doping silicon or germanium with a group 15 element such as phosphorus, which supplies an extra electron. A p-type is made by doping with a group 13 element such as boron, which leaves a hole. In the first the majority carriers are electrons, in the second holes.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Both remain electrically neutral overall.
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Solutions