Practice Test GeeksBEE - Bachelor of Electrical Engineering Practice Test
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Basic Electrical 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 sinusoidal voltage v(t) = 170 sin(377t) V. What is the RMS value?

    Answer: 120.2 V

    V_rms = V_peak / √2 = 170 / 1.414 ≈ 120.2 V.

  2. The time constant of an RC series circuit with R = 2 kΩ and C = 50 μF is:

    Answer: 0.1 s

    τ = RC = 2000 × 50×10⁻⁶ = 0.1 s.

  3. In a purely capacitive AC circuit, the current leads the voltage by:

    Answer: 90°

    In a purely capacitive circuit, the current leads voltage by 90° (or π/2 radians).

  4. Which of the following quantities is measured in Siemens?

    Answer: Conductance

    Conductance (G = 1/R) is measured in Siemens (S), the reciprocal of ohms.

  5. Two identical 12 V batteries with internal resistance 1 Ω each are connected in series. What is the total EMF and total internal resistance?

    Answer: 24 V, 2 Ω

    Series connection adds EMFs (12+12=24 V) and internal resistances (1+1=2 Ω).

  6. What is the frequency of the AC supply in the expression v(t) = 100 sin(314t + 30°) V?

    Answer: 50 Hz

    ω = 314 rad/s, so f = ω/(2π) = 314/6.28 ≈ 50 Hz.

  7. Thevenin's theorem replaces a complex network with:

    Answer: A voltage source in series with a resistance

    Thevenin's theorem states any linear network can be replaced by V_th in series with R_th.