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Pattern: Basic questions on classification of materials on the basis of energy bands and the structure of semiconductor materials:
Description: On the basis of overlap or gap between the valence band and conduction band, we are asked to classify the materials as metals, insulators and semiconductors. Questions are also asked regarding the structure of crystal in intrinsic semiconductors and extrinsic (n-type and p-type) semiconductors at the molecular level and how conduction is possible in such semiconductors.
Description: On the basis of overlap or gap between the valence band and conduction band, we are asked to classify the materials as metals, insulators and semiconductors. Questions are also asked regarding the structure of crystal in intrinsic semiconductors and extrinsic (n-type and p-type) semiconductors at the molecular level and how conduction is possible in such semiconductors.
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