Subject Repository
Electrical Engineering Mcqs
Showing 221 – 240 of 3,699 verified multiple choice questions with answers and explanations.
Q221NTS / FPSC / PPSC
The point of intersection of d.c. and a.c. load lines is called________________?
Q222NTS / FPSC / PPSC
If a transistor amplifier draws 2mA when input voltage is 10 V, then its input impedance is ____________?
Q223NTS / FPSC / PPSC
The output transformer used in a power amplifier is a _____________ transformer?
Q224NTS / FPSC / PPSC
The pulsating d.c. applied to power amplifier causes________________?
Q225NTS / FPSC / PPSC
If the gain versus frequency curve of a transistor amplifier is not flat, then there is distortion ?
Q226NTS / FPSC / PPSC
If the power rating of a transistor is 1W and collector current is 100mA, then maximum allowable collector voltage is________________?
Q227NTS / FPSC / PPSC
What will be the collector efficiency of a power amplifier having zero signal power dissipation of 5 watts and a.c. power output of 2 watts ?
Q228NTS / FPSC / PPSC
The driver stage usually employs_________________?
Q229NTS / FPSC / PPSC
The output signal voltage and current of a power amplifier are 5V and 200 mA; the values being r.m.s. What is the power output ?
Q230NTS / FPSC / PPSC
The push-pull circuit must use ______________ operation?
Q231NTS / FPSC / PPSC
What turn ratio (Np/Ns) of transformer is required to match 4 O speaker to a transistor having an output impedance of 8000 O ?
Q232NTS / FPSC / PPSC
For the same a.c. power output as above, what should be the minimum power rating of transistor for class B operation?
Q233NTS / FPSC / PPSC
The maximum a.c. power output from a class A power amplifier is 10 W. What should be the minimum power rating of the transistor used ?
Q234NTS / FPSC / PPSC
The class B push-pull circuit can deliver 100 W of a.c. output power. What should be the minimum power rating of each transistor ?
Q235NTS / FPSC / PPSC
Power amplifiers generally use transformer coupling because transformer permits______________?
Q236NTS / FPSC / PPSC
The most important consideration in power amplifier is __________________?
Q237NTS / FPSC / PPSC
A transformer coupled class A power amplifier has a load of 100 O on the secondary. If the turn ratio is 10:1, what is the value of load appearing on the primary?
Q238NTS / FPSC / PPSC
Transformer coupling can be used in______________amplifiers?
Q239NTS / FPSC / PPSC