⚡Electrical Engineering MCQs
Electrical Engineering MCQs
499 MCQs391
A dynamo converts______________?
Amechanical energy into electrical energy
Belectrical energy into mechanical energy
Cmagnetic energy into mechanical energy
Dmagnetic energy into electrical energy
392
cmf generated by A.C dynamo depends upon_____________?
Anumber of turns in the coil
Bmagnetic field strength
Cfrequency of rotation
Dall of above
393
Current produced by moving the loop of wire across a magnetic field is called_____________?
AA.C current
BD.C current
Cinduced current
Dmean square current
394
The practical illustration of the phenomenon of mutual induction is____________?
AA.C generator
BD.C dynamo
Cinduction coil
Dtransformer
395
In a certain low-pass filter, fc = 3.5 kHz.if the input voltage is a 6 V sine wave with a dc level of 10 V, what is the output voltage magnitude?
A0 V
B5.97 V
C6 V
D597 mV
396
A parallel resonant band-pass filter consists of a 90 Ω resistor in series with a parallel network made up of a 60 mH coil and a 0.02 µF capacitor. The output is taken across the capacitor/coil. The coil winding has a resistance of 20 Ω. What is the center frequency of the filter?
A459 Hz
B4,591 Hz
C999 Hz
D2,176 Hz
397
An RL high-pass filter consists of a 470 Ω resistor and a 600 mH coil. The output is taken across the coil. The circuit’s critical frequency is___________?
A125 Hz
B1,250 Hz
C564 Hz
D5,644 Hz
398
Three 10 kΩ resistors are connected in series. A 20 kΩ resistor is connected in parallel across one of the 10 kΩ resistors. The voltage source is 24 V. The total current in the circuit is___________?
A900 μA
B9 mA
C90 mA
D800 μA
399
A voltage divider consists of two 100 kΩ resistors and a 12 V source. What will the output voltage be if a load resistor of 1 MΩ is connected to the output?
A0.57 V
B6 V
C12 V
D5.7 V
400
Two 3.3 kΩ resistors are in series and this series combination is in parallel with a 4.7 kΩ resistor. The voltage across one of the 3.3 kΩ resistors is 12 V. The voltage across the 4.7 kΩ resistor is_________?
A24 V
B12 V
C0 V
D6 V