GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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have negative charge
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need less energy to move them
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experience collision less frequently
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experience collision more frequently
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Detailed explanation-1: -Assertion : In a semiconductor, the conduction electrons have a higher mobility than holes. Reason: The electrons experience fewer collisions.
Detailed explanation-2: -The mobility of electrons and holes depends on their effective masses. The effective mass of electrons is less than that of holes hence electrons have higher mobility than holes.
Detailed explanation-3: -Holes generally move more slowly than electrons, however, because they function within the tightly bound valence band rather than the conduction band. Ordinary temperatures are not high enough to excite many electrons into the conduction band.
Detailed explanation-4: -Electron and hole mobility are special cases of electrical mobility of charged particles in a fluid under an applied electric field. Electron mobility is almost always specified in units of cm2/(V⋅s). This is different from the SI unit of mobility, m2/(V⋅s). They are related by 1 m2/(V⋅s) = 104 cm2/(V⋅s).