AC Fundamentals and Phasors - Case Studies

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Q. In a circuit with a 50Ω resistor and a 100V AC source, what is the RMS current?
  • A. 1A
  • B. 2A
  • C. 0.5A
  • D. 0.25A
Q. In a circuit with a current of 5 A flowing through a resistor of 10 ohms, what is the voltage across the resistor?
  • A. 50 V
  • B. 5 V
  • C. 10 V
  • D. 15 V
Q. In a series circuit, if the total voltage is 12V and the resistances are 2Ω and 4Ω, what is the current flowing through the circuit?
  • A. 2A
  • B. 3A
  • C. 4A
  • D. 6A
Q. In an AC circuit, if the voltage is given as V(t) = 10sin(100t), what is the peak voltage?
  • A. 10V
  • B. 5V
  • C. 7.07V
  • D. 0V
Q. What is the equivalent resistance of two resistors, 3Ω and 6Ω, in parallel?
  • A.
  • B.
  • C. 1.5Ω
  • D.
Q. What is the equivalent resistance of two resistors, 4 ohms and 6 ohms, in series?
  • A. 10 ohms
  • B. 24 ohms
  • C. 2.4 ohms
  • D. 0.67 ohms
Q. What is the impedance of a circuit with a 4Ω resistor and a 3Ω inductor at a frequency of 60Hz?
  • A.
  • B.
  • C.
  • D.
Q. What is the Norton equivalent current if the Thevenin equivalent voltage is 10V and the load resistance is 5Ω?
  • A. 2A
  • B. 5A
  • C. 10A
  • D. 0A
Q. What is the power consumed by a 120 V AC circuit with a current of 3 A?
  • A. 360 W
  • B. 120 W
  • C. 240 W
  • D. 180 W
Q. What is the power consumed by a resistor of 10Ω with a current of 2A flowing through it?
  • A. 20W
  • B. 40W
  • C. 10W
  • D. 5W
Q. What is the Thevenin equivalent voltage if a circuit has a 12V source and a 4Ω resistor in series with a 2Ω load?
  • A. 12V
  • B. 8V
  • C. 6V
  • D. 4V
Q. What is the Thevenin equivalent voltage of a circuit with a 10 V source and a 5 ohm resistor in series with a 10 ohm load?
  • A. 10 V
  • B. 5 V
  • C. 15 V
  • D. 0 V
Q. What is the total voltage in a series circuit with a 12 V battery and two resistors of 4 ohms and 6 ohms?
  • A. 12 V
  • B. 10 V
  • C. 8 V
  • D. 6 V
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