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Southeast Lineman Training Center (SLTC) Practice Exam

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In electrical terms, what does R represent?
Correct Answer:
Resistance
Explanation:
R represents resistance—the opposition to current flow in a circuit. This property determines how much current will pass for a given voltage, described by Ohm’s law: V = IR, where I is current, V is voltage, and R is the resistance. The unit is the ohm (Ω). Capacitance, the ability to store charge in a capacitor, is represented by C and measured in farads. Inductance, which stores energy in a magnetic field when current changes, is represented by L and measured in henries. Conductance, the ease with which current flows, is the reciprocal of resistance and is measured in siemens; it’s denoted by G. So, the symbol R is specific to resistance, the factor that opposes current in circuits.

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