AIPMT PRELIMS 2005 Physics Band Theory MCQ Question
Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by (Eg)C, (Eg)Si and (Eg)Ge respectively. Which one of the following relationships is true in their case?
(Eg)C > (Eg)Si
(Eg)C = (Eg)Si
(Eg)C < (Eg)Ge
(Eg)C < (Eg)Si
Correct Answer
Detailed Explanation
Carbon has the largest band gap due to its strong covalent bonding, followed by silicon and germanium. Thus, (Eg)C > (Eg)Si > (Eg)Ge.
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