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DC Circuit Analysis & Theory 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 DC Circuit Analysis & Theory flashcards as text

  1. Three resistors of 6 Ω, 12 Ω, and 4 Ω are connected in parallel. What is the equivalent resistance?

    Answer: 2 Ω

    1/R = 1/6 + 1/12 + 1/4 = 2/12 + 1/12 + 3/12 = 6/12; R = 2 Ω.

  2. Kirchhoff's Current Law states that the sum of currents entering a node equals:

    Answer: The sum of currents leaving the node

    KCL is based on conservation of charge: current in = current out at any node.

  3. In a parallel circuit with a 24 V source and branch resistors of 8 Ω and 12 Ω, what is the total current supplied by the source?

    Answer: 5 A

    I1 = 24/8 = 3 A; I2 = 24/12 = 2 A; total = 5 A.

  4. A current divider has two parallel resistors, R1 = 10 Ω and R2 = 40 Ω. If total current is 5 A, how much flows through R1?

    Answer: 4 A

    I1 = I_total × R2/(R1+R2) = 5 × 40/50 = 4 A.

  5. Which of the following best describes a short circuit condition in a DC network?

    Answer: Zero resistance path between two nodes

    A short circuit provides a near-zero resistance path, causing maximum (potentially damaging) current flow.

  6. If the voltage across a parallel combination is 12 V and one branch draws 0.3 A while another draws 0.5 A, what is the total power consumed?

    Answer: 9.6 W

    Total current = 0.8 A; P = V × I = 12 × 0.8 = 9.6 W.

  7. Which statement about parallel circuits is correct?

    Answer: Voltage is the same across all branches

    In a parallel circuit, every branch is directly connected to the source, so each branch has the same terminal voltage.