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Electrical Circuits and Ohm's Law Flashcards

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

Read the first 7 Electrical Circuits and Ohm's Law flashcards as text

  1. A circuit has a voltage of 24 V and a resistance of 8 Ω. What is the current?

    Answer: 3 A

    Using Ohm's Law: I = V/R = 24/8 = 3 A.

  2. Two resistors of 6 Ω and 12 Ω are connected in parallel. What is the equivalent resistance?

    Answer: 4 Ω

    For parallel resistors: 1/R = 1/6 + 1/12 = 3/12, so R = 4 Ω.

  3. A resistor dissipates 50 W of power when 5 A flows through it. What is the resistance?

    Answer: 2 Ω

    Using P = I²R: R = P/I² = 50/25 = 2 Ω.

  4. Which component in a circuit is specifically designed to limit current flow?

    Answer: Resistor

    A resistor is designed to oppose and limit the flow of electric current in a circuit.

  5. If voltage across a resistor doubles while resistance stays the same, what happens to power dissipated?

    Answer: It quadruples

    Since P = V²/R, doubling V quadruples the power (2² = 4).

  6. In a series circuit with three resistors of 3 Ω, 5 Ω, and 7 Ω, what is the total resistance?

    Answer: 15 Ω

    Series resistances add directly: R_total = 3 + 5 + 7 = 15 Ω.

  7. A 9 V battery powers a circuit with 3 Ω total resistance. How much power is consumed?

    Answer: 27 W

    P = V²/R = 81/3 = 27 W.