Chapter 21, Problem 43P

The voltage across an AC power supply is given by $\Delta V_{\text{AC}}=\left(100\text{V}\right)\text{ sin }\left(2\pi 50t\right)\text{ Deterine }\left(\text{a}\right)\Delta V_{\text{rms}}\text{,}$ the period with which the voltage vibrates, (c) the amplitude of the current through the $200-\Omega$ resistor that is connected to this power supply, and (d) the average power transferred by the power supply to the resistor.