Practice Test GeeksBEE - Bachelor of Electrical Engineering Practice Test
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Electric Circuits Flashcards

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

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  1. A circuit has an impedance Z = 3 + j4 Ω. What is the magnitude of the impedance?

    Answer: 5 Ω

    |Z| = √(3² + 4²) = √(9 + 16) = √25 = 5 Ω.

  2. In mesh analysis, a mesh current is defined as a current flowing:

    Answer: Around a single closed loop (mesh) of the circuit

    Mesh analysis assigns a circulating current variable to each independent mesh (window pane) in the circuit.

  3. What happens to the capacitive reactance XC as frequency increases?

    Answer: XC decreases

    Capacitive reactance XC = 1/(2πfC), so as frequency increases, XC decreases.

  4. Which theorem states that maximum power is transferred to a load when the load resistance equals the source's Thevenin resistance?

    Answer: Maximum Power Transfer Theorem

    The Maximum Power Transfer Theorem states that PL is maximum when RL = Rth.

  5. The quality factor Q of a series RLC circuit is defined as:

    Answer: ω₀L / R

    For a series RLC circuit, Q = ω₀L/R = 1/(ω₀CR), representing the ratio of stored to dissipated energy.

  6. A voltage divider has R1 = 4 kΩ and R2 = 1 kΩ connected to a 10 V source. What is the voltage across R2?

    Answer: 2 V

    Voltage divider: V2 = 10 × R2/(R1+R2) = 10 × 1/(4+1) = 2 V.

  7. In an AC circuit, reactive power Q is measured in:

    Answer: Volt-Ampere Reactive (VAR)

    Reactive power, which represents energy oscillating between source and reactive elements, is measured in VAR.