CWEA Maintenance Technologist Practice Test

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Prepare for the CWEA Maintenance Technologist Test. Enhance your skills with flashcards and multiple choice questions. Understand each topic with detailed explanations. Get ready for success!

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What property restricts the flow of current in an electrical circuit?

Voltage
Power
Resistance
Capacitance

The correct answer is: Resistance

Resistance is the property that restricts the flow of current in an electrical circuit. It is a measure of how much a material opposes the passage of electric current. When a voltage is applied across a circuit, resistance determines how much current will flow. According to Ohm's Law, the relationship between voltage (V), current (I), and resistance (R) is expressed as V = I × R. This means that for a given voltage, increasing resistance will result in a decrease in current, illustrating the fundamental role of resistance in controlling electrical flow. In contrast, voltage represents the potential difference that drives current through a circuit, while power relates to the rate at which electrical energy is transferred or converted. Capacitance is associated with the ability of a circuit element to store charge, but it does not directly impede the flow of current in the same way resistance does.