27. Resistors & DC Circuits

Resistors and Ohm's Law

Multiple Choice
Which one of the following statements concerning resistors in series is true?
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Multiple Choice
A circuit has a voltage of $12 V$ across a resistor and a current of $2 A$ flowing through it. According to Ohm's Law, what is the value of the resistor $r$ ?
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Multiple Choice
In the context of resistors and Ohm's law, what SI unit is used to measure electrical resistance?
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Multiple Choice
Which formula represents Ohm's Law?
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Multiple Choice
Which equation correctly relates the current to the voltage in a simple circuit according to Ohm's Law?
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Multiple Choice
In the context of resistors and Ohm's law, which component provides resistance in an electric circuit?
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Multiple Choice
Which of the following is the Ohm’s law formula for finding current?
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Multiple Choice
In the context of resistors and Ohm's law, which SI unit is used to measure electrical resistance?
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Multiple Choice
In the context of resistors and Ohm's law, what is the SI unit of electrical resistance?
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Multiple Choice
In Ohm's Law, the variable letter $I$ stands for what physical quantity, and is measured in which unit?
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Multiple Choice
According to Ohm's Law, which of the following correctly relates the voltage $V$ , current $I$ , and resistance $R$ in a resistor?
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Multiple Choice
In a circuit, a measured voltage drop across a switch (with the switch intended to be closed) most directly indicates that the switch is behaving as what kind of circuit element?
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Multiple Choice
Four resistors with resistances $R_{1}$ , $R_{2}$ , $R_{3}$ , and $R_{4}$ are connected in series to a battery with voltage $V$ . What is the total current flowing through the circuit?
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Multiple Choice
In a DC circuit, a resistor has resistance $R$ and the current through it is $I$ . According to Ohm's law, what is the voltage drop across the resistor?
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Multiple Choice
In the context of resistors and Ohm's law, what is the SI unit of electrical resistance?
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