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Question

The most widely used semiconductors are
(i) silicon (ii) germanium
(iii) phosphorus (iv) arsenic
  1. (i) and (ii)
  2. (ii) and (iii)
  3. (iii) and (iv)
  4. (i), (ii), (iv),(iii)

A
(i) and (ii)
B
(iii) and (iv)
C
(ii) and (iii)
D
(i), (ii), (iv),(iii)
Solution
Verified by Toppr

The correct option is A (i) and (ii)
Si and Ge are most widely used semiconductors because of their atomic structures. They have 4 electrons in valence shell which forms four covalent bonds with neighboring atoms in crystal lattice which can be altered by adding dopants.
Whereas, phosphorus and arsenides are dopants added to a pure semiconductor to increase their conductivity.

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