Electrical Engineering MCQs

Page No. 10

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


View Answer a larger bandwidth

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


View Answer 10.60 V

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


View Answer 18 V peak-to-peak

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


View Answer zero

Vout = 500 mV, and Vin = 1.3 V. The ratio Vout/ Vin expressed in dB is__________?


a0 dB


b 8.30 dB


c -8.30 dB


d 0.8 dB


View Answer -8.30 dB

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


c 5.03 MHz


d503 kHz


View Answer 5.14 MHz

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


b 5.97 V


c6 V


d597 mV


View Answer 5.97 V

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


b 93.8 Hz


c861 Hz


d86.12 kHz


View Answer 93.8 kHz

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


d 3,617 Hz


View Answer 3,617 Hz

At a certain frequency, the output voltage of a filter is 6 V and the input is 12 V. The voltage ratio in decibels is_____________?


a6.02 dB


b-6.02 dB


c12.04 dB


d-12.04 dB


View Answer -6.02 dB

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