Analog Electronics
Conduction electrons have more mobility than holes because they

 need less energy to move them
 have negative charge
None of these
 are free

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Analog Electronics
A working diode must have

 High resistance when forward or reverse biased
 High resistance when forward biased, while low resistance when reverse bias
 Low resistance when forward or reverse biased
 Low resistance when forward biased, while high resistance when reverse bias

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