frequency

A square wave signal of frequency 20 kHz is passed through an ideal low-pass filter with cut-off frequency of 21 kHz. The output signal is a _________.

In a series RL circuit shown in the figure, the current through the resistor lags the AC source voltage by 45°. Let R = 100π Ω and L = 2 H. The frequency of the source is _______ H...

A closed Lissajous pattern observed on an oscilloscope in the X - Y mode has three horizontal tangencies and two vertical tangencies in steady state. If the signal-frequency on cha...

In the phase-locked-loop circuit shown below, the output of the VCO is a digital square wave. If the input is a square wave at 10 kHz, the steady state frequency of the output is _...