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_____________?
(A) 723 Hz
(B) 7,234 Hz
(C) 362 Hz
(D) 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_____________?
(A) 6.02 dB
(B) -6.02 dB
(C) 12.04 dB
(D) -12.04 dB
A dynamo converts______________?
(A) mechanical energy into electrical energy
(B) electrical energy into mechanical energy
(C) magnetic energy into mechanical energy
(D) magnetic energy into electrical energy
cmf generated by A.C dynamo depends upon_____________?
(A) number of turns in the coil
(B) magnetic field strength
(C) frequency of rotation
(D) all of above
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?
(A) 0 V
(B) 5.97 V
(C) 6 V
(D) 597 mV
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?
(A) 459 Hz
(B) 4,591 Hz
(C) 999 Hz
(D) 2,176 Hz
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___________?
(A) 125 Hz
(B) 1,250 Hz
(C) 564 Hz
(D) 5,644 Hz
An RC low-pass filter consists of a 120 Ω resistor and a 0.002 µF capacitor. The output is taken across the capacitor. The circuit’s critical frequency is___________?
(A) 333 kHz
(B) 633 kHz
(C) 331 kHz
(D) 60 kHz
In a certain low-pass filter, fc = 3.5 kHz. Its pass-band is_______________?
(A) 0 Hz to 3.5 kHz
(B) 0 Hz
(C) 3.5 kHz
(D) 7 kHz
An RC high-pass filter consists of an 820 Ω resistor. What is the value of C so that Xc is ten times less than Rat an input frequency of 12 kHz?
(A) 81 µF
(B) 161 µF
(C) 0.161 µF
(D) 220 µF