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  4. Statement I: Silicon is preferred over germanium for making semiconductor devices. Statement II: The energy gap for germanium is more than the energy gap of silicon.

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Q. Statement I: Silicon is preferred over germanium for making semiconductor devices.
Statement II: The energy gap for germanium is more than the energy gap of silicon.

Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

The energy gap for germanium is less $(0.72\, eV )$ than the energy gap of silicon ( $1.1\, eV$ ). Silicon is preferred over germanium for making semiconductor devices because they are abundantly available in nature, do not get easily damaged by heat and cut off current is very low.