Analog Electronics
A dc power supply has no-load voltage of 30v,and a full-load voltage of 25v at full-load current of 1A.Its output resistance & load regulation ,respectively are

25 Ω & 16.7 %
5 Ω & 20 %
5 Ω & 16.7 %
25 Ω & 20 %

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Analog Electronics
In all base driver amplifiers

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

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