Question 15.3: A sine wave has a maximum voltage of 350 V. At what angle of......
A sine wave has a maximum voltage of 350 V. At what angle of rotation will the voltage reach 53 V?
Step-by-Step
\sin \angle \theta=\frac{E_{\text {(INST) }}}{E_{\text {(MAX) }}}
\sin \angle \theta=\frac{53 \mathrm{~V}}{350 \mathrm{~V}}
\sin \angle \theta=0.151
Note: 0.151 is the sine of the angle, not the angle. To find the angle that corresponds to a sine of 0.151, use the trigonometric tables located in Appendices A and B or a scientific calculator.
\angle \theta=8.685^{\circ}
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