Practice Test Geeks(NETA) InterNational Electrical Testing Association Certified Technicians Practice Test
← All NETA Flashcard Decks

AC/DC Theory and Circuits Flashcards

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

Read the first 7 AC/DC Theory and Circuits flashcards as text

  1. In a three-phase delta-connected system with a line voltage of 208 V, what is the phase voltage?

    Answer: 208 V

    In a delta connection, the phase voltage equals the line voltage, so Vphase = 208 V.

  2. What happens to the total capacitance when capacitors are connected in series?

    Answer: Total capacitance is less than the smallest individual capacitance

    Capacitors in series combine like resistors in parallel; the total is always less than the smallest individual value.

  3. Skin effect in AC conductors causes current to:

    Answer: Concentrate near the outer surface of the conductor

    At higher AC frequencies, skin effect causes current density to concentrate near the conductor surface, increasing effective resistance.

  4. A 60 Hz AC circuit has an inductance of 0.1 H. What is the inductive reactance?

    Answer: 37.7 Ω

    XL = 2πfL = 2π × 60 × 0.1 ≈ 37.7 Ω.

  5. Which law states that the algebraic sum of all currents entering and leaving a node in a circuit equals zero?

    Answer: Kirchhoff's Current Law

    Kirchhoff's Current Law (KCL) states that the sum of currents entering a node equals the sum leaving it.

  6. An AC waveform has a peak value of 170 V. What is the approximate RMS value?

    Answer: 120 V

    Vrms = Vpeak / √2 = 170 / 1.414 ≈ 120 V.

  7. In a DC circuit, if the supply voltage remains constant and the circuit resistance is doubled, the power dissipated will:

    Answer: Be reduced by half

    P = V²/R; with constant voltage, doubling R halves the power dissipated.