The reciprocal of resistance is called which of the following?

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Prepare for the New York City Electrician Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

The reciprocal of resistance is called which of the following?

Explanation:
The reciprocal of resistance is conductance. Resistance measures how much a component resists current flow, while conductance measures how easily current can flow through it. They are inverses of each other: G = 1/R. If a resistor’s resistance increases, its conductance decreases, and vice versa. Conductance is measured in siemens (S). In AC contexts you also encounter admittance, Y = 1/Z, whose real part is conductance, with the imaginary part (susceptance) accounting for reactive effects. The other terms are different: voltage is the driving force (volts), current is the flow (amps), and impedance is the total opposition in an AC circuit, combining resistance and reactance.

The reciprocal of resistance is conductance. Resistance measures how much a component resists current flow, while conductance measures how easily current can flow through it. They are inverses of each other: G = 1/R. If a resistor’s resistance increases, its conductance decreases, and vice versa. Conductance is measured in siemens (S). In AC contexts you also encounter admittance, Y = 1/Z, whose real part is conductance, with the imaginary part (susceptance) accounting for reactive effects. The other terms are different: voltage is the driving force (volts), current is the flow (amps), and impedance is the total opposition in an AC circuit, combining resistance and reactance.

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