Answer the following question given this paragraph: 

Resistors in an AC Circuit Just as a reminder, consider Figure 23.47, which shows an AC voltage applied to a resistor and a graph of voltage and current versus time. The voltage and current are exactly in phase in a resistor. There is no frequency dependence to the behavior of plain resistance in a circuit:.


Q: The voltage and current are exactly in phase in a what?


A:
resistor