27. Resistors & DC Circuits

Resistors and Ohm's Law

Multiple Choice
In the context of resistors and Ohm’s law, what quantity describes the opposition to electric current flow in a circuit?
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Multiple Choice
In the context of Ohm's law, what SI unit is used to measure electrical resistance?
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Multiple Choice
If two resistors with resistances $R_{1}$ and $R_{2}$ are connected in series, what is the effective resistance $r$ of the system?
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Multiple Choice
Which of the following equations represents Ohm's Law?
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Multiple Choice
A wire runs from the positive plate of a capacitor, into lightbulb 1, then out from lightbulb 1 directly into lightbulb 2. When lightbulb 2 is connected to the negative plate of the capacitor, what is true about the charge moving through the two lightbulbs?
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Multiple Choice
Which of the following is not an application of Ohm's Law?
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Multiple Choice
In the context of resistors and Ohm's law, a unit of electric resistance is called a(n):
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Multiple Choice
According to Ohm's law, the current $I$ through a resistor equals what expression in terms of voltage $V$ and resistance $R$ ?
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Multiple Choice
In basic circuit measurements related to resistors and Ohm’s law, which instrument is used to measure electrical resistance?
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Multiple Choice
In a DC circuit, what can an excessive voltage drop measured across a component most likely indicate?
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Multiple Choice
Which of the following is NOT an application of Ohm's law?
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Multiple Choice
Which of the following is true about the change in potential across a resistor in a circuit?
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Multiple Choice
In a DC circuit, which component opposes current flow?
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Multiple Choice
Ohm's law describes the relationship between which physical quantities in an electrical circuit (for an ohmic resistor)?
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Multiple Choice
Conductor resistance causes a(n) $V_{drop}$ between the voltage source and the connected load. Which term best completes the sentence?
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