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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27. Resistors & DC Circuits
Resistors and Ohm's Law
Multiple Choice
In the context of resistors and Ohm's law, what component is commonly used to control (limit) electric current in a circuit?
A
An inductor
B
A resistor
C
A capacitor
D
A diode
Verified step by step guidance1
Understand that Ohm's law relates voltage (V), current (I), and resistance (R) in a circuit by the formula \(V = I \times R\).
Recognize that to control or limit the electric current in a circuit, you need a component that provides resistance, which opposes the flow of current.
Identify that a resistor is the component designed specifically to provide a known amount of resistance, thereby controlling the current according to Ohm's law.
Note that other components like inductors, capacitors, and diodes serve different purposes: inductors oppose changes in current, capacitors store charge, and diodes allow current to flow in only one direction.
Conclude that the resistor is the common and correct component used to control or limit electric current in a circuit.
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