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BEE Bachelor of Electrical Engineering Electric Circuit Analysis Questions and Answers Flashcards

6 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 Wheatstone bridge is balanced when R1 = 100 Ω, R2 = 200 Ω, and R3 = 150 Ω. What is the unknown resistance R4?

    Answer: 300 Ω

    For a balanced bridge R1/R2 = R3/R4, giving R4 = R2×R3/R1 = 200×150/100 = 300 Ω.

  2. In a circuit, a 6 V source drives a loop containing resistors of 1 Ω, 2 Ω, and 3 Ω in series. What is the voltage drop across the 2 Ω resistor?

    Answer: 2 V

    Loop current is 6/(1+2+3) = 1 A, so V across 2 Ω is 1 × 2 = 2 V.

  3. What does Norton's theorem state about a linear two-terminal network?

    Answer: It can be replaced by a current source in parallel with a resistance

    Norton's theorem represents any linear two-terminal network as an equivalent current source in parallel with a resistance.

  4. An inductor of 0.5 H carries a current that changes from 2 A to 6 A in 0.1 s. What is the induced voltage across it?

    Answer: 20 V

    V = L × (ΔI/Δt) = 0.5 × (4/0.1) = 20 V.

  5. Three 9 Ω resistors are connected in delta. What is the equivalent resistance of each arm in the corresponding star (Y) network?

    Answer: 3 Ω

    For identical delta resistors, each star resistance is R_delta/3 = 9/3 = 3 Ω.

  6. What is the power factor of a purely resistive AC circuit?

    Answer: 1

    In a purely resistive circuit voltage and current are in phase, giving a power factor of unity (1).