(a) What is an intrinsic semiconductor? (b) Distinguish between the p-type and n-type semi-conductors.
PHYSICS
WAEC 2018
(a) What is an intrinsic semiconductor?
(b) Distinguish between the p-type and n-type semi-conductors.
Explanation
(a) An intrinsic semiconductor contains equal number of free electrons and holes.
(b)
| p— TYPE | n - TYPE | |
| i | The majority carrier of electricity is holes. | The majority carrier of electricity is electron. |
| ii | Carries a net positive charge | Carries a net negative charge |
| iii | The impurity is trivalent | The impurity is pentavalent. |
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