JAMB Physics 2017 Objective — Question 27
Question 27 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2017 Objective paper, with the correct answer and a full explanation.
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Calculate the voltage across a 5μF capacitor connected to an ac source of frequency 50/πHz when a current of 0.25A flows through the circuit.
- A. A. 1591.3V
- B. B. 2000.0V
- C. C. 500.0VCorrect
- D. D. 397.8V
Explanation
Xc=1/(2πfC)=1/(2x50x5x10⁻⁶)=2000Ω; V=IXc=0.25x2000=500V.
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