A circuit has two terminals on the left which are labeled input. the upper terminal connects to one end of a resistor which is labeled R. The far end of the resistor goes to the top end of a capacitor labeled C. The bottom end of the capacitor goes to the common line. The lower terminal on the left also goes to the common line. There are two terminals on the right labeled output. The top terminal goes to the junction of the capacitor and resistor. The bottom terminal goes to the common line. To the left of the circuit is a graph of a sine wave. It is about 3 times it's own height above the zero axis. This wave is indicated as the input wave for the circuit. On the right is the graph of a very low amplitude sine wave which is the same height above the zero axis as the wave on the left. This is the output wave from the circuit. The period of the output wave is the same as the period of the input wave.
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