The best frequency response is of_____________coupling?
(A) RC
(B) Transformer
(C) Direct
(D) None of the above
In obtaining the frequency response curve of an amplifier, the______________?
(A) Amplifier level output is kept constant
(B) Amplifier frequency is held constant
(C) Generator frequency is held constant
(D) Generator output level is held constant
A certain circuit is composed of two parallel resistors. The total resistance is 1,403 Ω. One of the resistors is 2 kΩ. The other resistor value is____________?
(A) 1,403 Ω
(B) 4.7 kΩ
(C) 2 kΩ
(D) 3,403 Ω
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
A 12 kΩ resistor, a 15 kΩ resistor, and a 22 kΩ resistor are in series with two 10 kΩ resistors that are in parallel. The source voltage is 75 V. Current through the 15 kΩ resistor is approximately___________?
(A) 14 mA
(B) 1.4 mA
(C) 5 mA
(D) 50 mA
A voltage divider consists of two 68 kΩ resistors and a 24 V source. The unknown output voltage is______________?
(A) 12 V
(B) 24 V
(C) 0 V
(D) 6 V
A gain of 1000 times in voltage is expressed by_______________?
(A) 60 db
(B) 30 db
(C) 120 db
(D) 600 db
The upper or lower cut off frequency is also called______________frequency?
(A) Resonant
(B) Sideband
(C) 3 db
(D) None of the above
The power output of an audio system is 18 W. For a person to notice an increase in the output (loudness or sound intensity) of the system, what must the output power be increased to ?
(A) 2 W
(B) 6 W
(C) 68 W
(D) None of the above
The number of stages that can be directly coupled is limited because___________?
(A) Changes in temperature cause thermal instability
(B) Circuit becomes heavy and costly
(C) It becomes difficult to bias the circuit
(D) None of the above