Practice Test Geeks(EETC) Electrical Technician Certification Practice Test
← All EETC Flashcard Decks

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. Norton's equivalent circuit consists of:

    Answer: A current source in parallel with an impedance

    Norton's equivalent circuit consists of an equivalent current source (IN) in parallel with an equivalent impedance (ZN).

  2. What is the phase angle of a series circuit with R = 30 Ω and XL = 40 Ω?

    Answer: 53.13°

    θ = arctan(XL/R) = arctan(40/30) = arctan(1.333) ≈ 53.13°.

  3. In a parallel RLC circuit at resonance, the circuit impedance is:

    Answer: Maximum

    At resonance in a parallel RLC circuit, the impedance reaches its maximum value because the parallel LC combination presents infinite impedance.

  4. A 10 mH inductor carries a current that changes at 500 A/s. What is the induced EMF?

    Answer: 5 V

    e = L(di/dt) = 0.010 H × 500 A/s = 5 V.

  5. The maximum power transfer theorem states that maximum power is delivered to a load when the load impedance equals:

    Answer: The complex conjugate of the source impedance

    Maximum power transfer occurs when ZL = Zs* (complex conjugate), meaning equal resistance and opposite sign reactance.

  6. What is the total capacitance of three capacitors (4 µF, 6 µF, 12 µF) connected in series?

    Answer: 2 µF

    1/C = 1/4 + 1/6 + 1/12 = 3/12 + 2/12 + 1/12 = 6/12, so C = 2 µF.

  7. In a balanced three-phase system, the line voltage is related to the phase voltage by a factor of:

    Answer: √3

    In a balanced three-phase wye-connected system, VLine = √3 × VPhase ≈ 1.732 × VPhase.