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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. What does a voltmeter measure in a circuit?

    Answer: Potential difference across a component

    A voltmeter measures the potential difference (voltage) across two points in a circuit.

  2. How is an ammeter correctly connected in a circuit?

    Answer: In series with the component

    An ammeter must be connected in series so all current flows through it for accurate measurement.

  3. A circuit has two resistors (10 Ω and 40 Ω) in parallel connected to a 20 V source. What current flows through the 10 Ω resistor?

    Answer: 2 A

    Voltage is the same across parallel components, so I = V/R = 20/10 = 2 A.

  4. What is the unit of electrical power?

    Answer: Watt

    Electrical power is measured in watts (W), where 1 W = 1 joule per second.

  5. Which statement best describes Kirchhoff's Current Law (KCL)?

    Answer: Current entering a node equals current leaving it

    KCL states that the total current entering a junction equals the total current leaving it.

  6. A light bulb has a resistance of 240 Ω when connected to a 120 V source. How much current flows?

    Answer: 0.5 A

    I = V/R = 120/240 = 0.5 A.

  7. What happens to the total resistance when more resistors are added in parallel?

    Answer: Total resistance decreases

    Adding more parallel paths gives current more ways to flow, reducing the total resistance.