A high-pass filter’s task is just the opposite of a low-pass filter it offers easy passage of a high-frequency signal and difficult passage to a low-frequency signal. The capacitor’s impedance increases with decreasing frequency. This high impedance in series tends to block low-frequency signals from getting to load.
The inductance impedance decreases with decreasing frequency. This low impedance in parallel tends to short out low-frequency signals from getting to the load resistor. As a consequence, most of the voltage gets dropped across series resistor R.
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