⚡Electrical Engineering MCQs
Electrical Engineering MCQs
499 MCQs381
In a series resonant band-pass filter, a lower value of Q results in______________?
Aa higher impedance
Ba smaller bandwidth
Ca higher resonant frequency
Da larger bandwidth
382
The maximum output voltage of a certain low-pass filter is 15 V. The output voltage at the critical frequency is_____________?
A10.60 V
B0 V
C21.21 V
D15 V
383
The same signal in Problem 2 is applied to an RC high-pass filter. If the reactance is zero at the input frequency, the output voltage is____________?
A12.73 V peak-to-peak
B18 V peak-to-peak
C9 V peak-to-peak
Dzero
384
A sinusoidal voltage with a peak-to-peak value of 18 V is applied to an RC low-pass filter. If the reactance at the input frequency is zero, the output voltage is____________?
A18 V peak-to-peak
Bzero
C9 V peak-to-peak
D12.74 V peak-to-peak
385
Vout = 500 mV, and Vin = 1.3 V. The ratio Vout/ Vin expressed in dB is__________?
A0 dB
B8.30 dB
C-8.30 dB
D0.8 dB
386
A parallel resonant band-pass filter consists of a 6.8 Ω resistor in series with a parallel network made up of an 8 µH coil and a 120 pF capacitor. The output is taken across the capacitor/coil. Assume RW = 0 Ω. What is the center frequency of the filter?
A5.14 MHz
B514 kHz
C5.03 MHz
D503 kHz
387
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
388
emf induced in a circuit according to Faradays law depends on the_____________?
Amaximum magnetic flux
Brate of change of magnetic flux
Cchange in magnetic flux
Dinitial magnetic flux
389
Weber is the unit of_____________?
AMagnetic field intensity
Bmagnetic induction
Cmagnetic flux
Dself-inductance
390
A.C cannot be used for_______________?
Aproducing heat
Bproducing light
Cmagnetizing and electroplating
Dall the above