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  4. Assertion: In a semiconductor, the conduction electrons have a higher mobility than holes. Reason: The electrons experience fewer collisions.

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Q. Assertion : In a semiconductor, the conduction electrons have a higher mobility than holes.
Reason : The electrons experience fewer collisions.

Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

Electrons experience much collisions. The mobility of electrons is more because they require less energy to move, not because they are lighter.