Resistor in an ac circuit

  What happens when an ac voltage is applied across a resistor? Recall that in a resistor, the current through the resistor is proportional to the electrical potential difference (voltage) applied across it (Ohm's law). In the applet below you can see how the current follows the applied voltage. Notice what happens to the current when the voltage and/or resistance are changed.

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Use the above simulation to answer the following questions?