Post-UTME Physics 2016 Objective — Question 9
Question 9 of 20 from the Post-UTME Screening (Post-UTME) Physics 2016 Objective paper, with the correct answer and a full explanation.
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An A.C voltage has a peak value of 170V. What is the instantaneous voltage when it reaches 45 degrees of its cycle?
- A. 38V
- B. 120VCorrect
- C. 135V
- D. 210V
Explanation
V = Vpeak x sin(45) = 170 x 0.707 = 120V.
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