Practice Test Geeks(CET) Certified Electronics Technician Practice Test
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Circuit Theory and Analysis Flashcards

7 cards from real CET 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 and Analysis flashcards as text

  1. The Wye-to-Delta (Y-Δ) conversion formula for one Delta resistor R_AB is:

    Answer: R_AB = (R_A × R_B + R_B × R_C + R_A × R_C) / R_C

    Each Delta resistor equals the sum of products of adjacent Wye resistors divided by the opposite Wye resistor.

  2. In nodal analysis, the reference node is commonly called the:

    Answer: Ground node

    The reference node, assigned a voltage of 0 V, is called the ground node, and all other node voltages are measured with respect to it.

  3. An ideal inductor of 200 mH carries a steady DC current of 5 A. The energy stored in its magnetic field is:

    Answer: 2.5 J

    Energy stored in an inductor: W = ½LI² = ½ × 0.2 × 25 = 2.5 J.

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

    Answer: The complex conjugate of the source impedance

    Maximum power transfer occurs when Z_load = Z_source* (complex conjugate), which for resistive circuits means R_load = R_source.

  5. Two inductors L1 = 8 H and L2 = 8 H are connected in parallel with no mutual coupling. The total inductance is:

    Answer: 4 H

    Parallel inductors (no coupling): 1/LT = 1/8 + 1/8 = 2/8, so LT = 4 H.

  6. In a circuit, the admittance Y is the reciprocal of:

    Answer: Impedance

    Admittance Y = 1/Z, where Z is the complex impedance; admittance has units of siemens (S).

  7. A voltage divider consists of R1 = 3 kΩ and R2 = 1 kΩ in series with a 12 V source. The voltage across R2 is:

    Answer: 3 V

    V_R2 = 12 × (1k / (3k + 1k)) = 12 × 0.25 = 3 V.