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- Basic Math and Science Electrical Circuits and Ohm's Law Questions and Answers Flashcards

6 cards from real BMST 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. According to Ohm's Law, if voltage is 12V and resistance is 4Ω, what is the current?

    Answer: 3A

    Ohm's Law: I = V/R = 12/4 = 3 amperes.

  2. In a series circuit with three resistors of 2Ω, 3Ω, and 5Ω, what is the total resistance?

    Answer: 10Ω

    In series circuits, total resistance is the sum: 2 + 3 + 5 = 10Ω.

  3. What is the unit of electrical resistance?

    Answer: Ohm (Ω)

    Resistance is measured in ohms (Ω), named after Georg Simon Ohm.

  4. What happens to current in a circuit if resistance doubles while voltage stays constant?

    Answer: Current is halved

    From I = V/R, doubling R halves I when V is constant.

  5. In a parallel circuit, what is true about the voltage across each branch?

    Answer: It is the same across all branches

    In parallel circuits, all branches share the same voltage from the source.

  6. What is electrical power measured in?

    Answer: Watts

    Power is measured in watts (W). P = V × I.