Analog Electronics
Depending upon the switching recovery time and on state drop, the power diodes are types

  General purpose, fast recovery and schottly.
 Fast recovery, Schottky.
 None of these.
 General purpose, fast recovery.

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Analog Electronics
In all base driver amplifiers

ac collector voltage is in phase with ac base voltage
ac collector voltage is 180° out of phase with ac base voltage
ac emitter voltage is 180° out of phase with ac base voltage
None of these

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