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Electronic Devices question

2007 · Shift 0 · Q65
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Electronic Devices question

2007 · Shift 0 · Q65

JEE MainPhysicsElectronic DevicesMCQ+4 / −1
Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate ?
  1. A
    The number of free electrons for conduction is significant only in SiSiSi and GeGeGe but small in C.C.C.
  2. B
    The number of free conduction electrons is significant in CCC but small in SiSiSi and Ge.Ge.Ge.
  3. C
    The number of free conduction electrons is negligibly small in all the three.
  4. D
    The number of free electrons for conduction is significant in all the three
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