A. Operating point
B. Current gain
C. Voltage gain
D. None of the above
✅ The correct answer is option A.
Electrical Engineering MCQs
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?
A. 5 kO
B. 20 kO
C. 100 kO
D. 10 kO
✅ The correct answer is option D.
A CS JFET amplifier has a load resistance of 10 kO , RD= 820O . If gm= 5mS and Vin= 500 mV, the output signal voltage is__________________?
A. 2.05 V
B. 25 V
C. 0.5 V
D. 1.89 V
✅ The correct answer is option D.
The size of a power transistor is made considerably large to________________?
A. Provide easy handling
B. Dissipate heat
C. Facilitate connections
D. None of the above
✅ The correct answer is option B.
A tuned amplifier is generally operated in ____________operation?
A. Class A
B. Class C
C. Class B
D. None of the above
✅ The correct answer is option B.
In a certain common-source D-MOSFET amplifier, Vds =3.2 V r.m. and Vgs = 280 mV r.m.s. The voltage gain is_______________?
A. 1
B. 11.4
C. 8.75
D. 3.2
✅ The correct answer is option B.
A class C amplifier always drives _____________load?
A. A pure resistive
B. A pure inductive
C. A pure capacitive
D. A resonant tank
✅ The correct answer is option D.
A certain Wheatstone bridge has the following resistor values: R1 = 10 kΩ, R2 = 720 Ω, and R4 = 2.4 kΩ. The unknown resistance is_____________?
A. 24 Ω
B. 2.4 Ω
C. 300 Ω
D. 3,000 Ω
✅ The correct answer is option D.
At room temperature, an intrinsic semiconductor has_______________?
A. Many holes only
B. A few free electrons and holes
C. Many free electrons only
D. No holes or free electrons
✅ The correct answer is option B.
When an a.c. signal is applied to an amplifier, ,the operating point moves along_________________?
A. c. load line
B. c. load line
C. both d.c. and a.c. load lines
D. none of the above
✅ The correct answer is option B.