Practice Test Geeks(EETC) Electrical Technician Certification Practice Test
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Circuit Theory Flashcards

7 cards from real EETC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Circuit Theory flashcards as text

  1. According to Kirchhoff's Voltage Law (KVL), the algebraic sum of all voltages around a closed loop equals:

    Answer: Zero

    KVL states that the algebraic sum of all voltage rises and drops around any closed loop must equal zero.

  2. A circuit has an impedance of 5 + j12 Ω. What is the magnitude of this impedance?

    Answer: 13 Ω

    |Z| = √(5² + 12²) = √(25 + 144) = √169 = 13 Ω.

  3. Which type of filter passes low-frequency signals and attenuates high-frequency signals?

    Answer: Low-pass filter

    A low-pass filter allows frequencies below its cutoff frequency to pass while attenuating higher frequencies.

  4. In the Superposition Theorem, when analyzing the effect of one source, all other independent voltage sources are:

    Answer: Replaced with short circuits

    When applying the Superposition Theorem, independent voltage sources not being analyzed are replaced with short circuits (zero voltage).

  5. What is the resonant frequency of a series RLC circuit with L = 10 mH and C = 10 µF?

    Answer: 503 Hz

    f₀ = 1/(2π√LC) = 1/(2π√(0.01 × 0.00001)) = 1/(2π × 0.000316) ≈ 503 Hz.

  6. The Q-factor (quality factor) of a resonant circuit indicates:

    Answer: The sharpness of the resonance peak and energy storage efficiency

    The Q-factor represents the sharpness of the resonance peak and is the ratio of energy stored to energy dissipated per cycle.

  7. If a 24V source drives a circuit with 3 Ω and 5 Ω resistors in series, what is the voltage drop across the 5 Ω resistor?

    Answer: 15V

    Total R = 8 Ω, I = 24/8 = 3A; V₅ = 3A × 5 Ω = 15V using the voltage divider principle.