Engineering Board Exam Reviewer · Alternating Current and Voltage · medium
Two series-connected sources produce v1=30 t V and v2=40 ( t+90°) V. What is the peak value of the total voltage?
- 70 V
- 50 V
- 10 V
- 35 V
Answer
B. 50 V
Solution
The two sinusoids are 90° apart, so their phasors add at right angles: Vm=sqrt(302+402)=50 V.
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