⚡Electrical Engineering MCQs
Electrical Engineering MCQs
499 MCQs361
In a series–parallel circuit consisting of R1 and R2 in series and connected in parallel with R3, if R1 opens, then R2‘s voltage will:___________?
Aincrease
Bremain the same
Cdecrease
Dcannot tell
362
The current flowing through an unloaded voltage divider is called the____________?
Ableeder current
Bload current
Cresistor current
Dvoltage current
363
With 21 V applied, if R1 = 5 ohms, R2 = 35 ohms, and R3 = 14 ohms, what is the current of R2 if R1 is series connected with parallel circuit R2 and R3?
A200 mA
B400 mA
C600 mA
D800 mA
364
If R1 is in series with parallel connected to R2 and R3, what happens to total current if R2 opens?
Acannot tell
Bremains the same
Cincreases
Ddecreases
365
A Wheatstone bridge can be used to determine an unknown_____________?
Acurrent
Bvoltage
Cresistance
Dpower
366
A gain of 1000 times in voltage is expressed by_______________?
A60 db
B30 db
C120 db
D600 db
367
The upper or lower cut off frequency is also called______________frequency?
AResonant
BSideband
C3 db
DNone of the above
368
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 ?
A2 W
B6 W
C68 W
DNone of the above
369
An RL low-pass filter consists of a 5.6 mH coil and a 3.3 kΩ resistor. The output voltage is taken across the resistor. The circuit’s critical frequency is______________?
A93.8 kHz
B93.8 Hz
C861 Hz
D86.12 kHz
370
An RC high-pass filter consists of a 0.2 µF capacitor and a 220 Ω resistor. The output is taken across the resistor. The circuit’s critical frequency is_____________?
A723 Hz
B7,234 Hz
C362 Hz
D3,617 Hz