Analog Electronics
Voltage Series (feedback also called series-shunt feedback) results in

Increase in both input & output impedances
Decreases in both input & output impedances
Increase in input impedance & decreases in output impedance
Decrease in input impedance & increase in output impedance

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Analog Electronics
In all base driver amplifiers

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

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