Multiple Choice
Which of the following best describes Ohm's Law?
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27. Resistors & DC Circuits
Resistors and Ohm's Law
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According to Ohm's Law, what is the relationship between the current and the voltage across a resistor in a circuit?
A
The current is equal to the product of voltage and resistance, as described by .
B
The current is independent of the voltage across the resistor.
C
The current is directly proportional to the voltage, as described by .
D
The current is inversely proportional to the voltage, as described by .
Verified step by step guidance1
Recall Ohm's Law, which states the relationship between voltage (V), current (I), and resistance (R) in a resistor.
Ohm's Law is mathematically expressed as \(I = \frac{V}{R}\), where current is the voltage divided by the resistance.
This means that the current through a resistor is directly proportional to the voltage across it, assuming resistance remains constant.
If the voltage increases, the current increases proportionally; if the voltage decreases, the current decreases proportionally.
Therefore, the correct relationship is that current is directly proportional to voltage, described by \(I = \frac{V}{R}\).
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