Goodwin Bryant
06/08/2023 · Primary School
2. The voltage, \( E \), for an electrical circuit can be modeled by \( E=4.5 \sin 40 \pi t \) where \( t \) is time measured in seconds. How many cycles are completed in one second, circle the correct choice below? ( 4 points) \( \begin{array}{llll}\text { (a) } 4.5 \text { cycles } & \text { (b) } 20 \text { cycles } & \text { (c) } 40 \pi \text { cycles } & \text { (d) } 40 \text { cycles }\end{array} \)
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The correct choice is (b) 20 cycles.
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