What is the reciprocal of resistance?

The reciprocal of resistance is conductance. In electrical terms, resistance is measured in ohms (Ω) and represents how much a material opposes the flow of electric current. Conductance, on the other hand, is the measure of how easily electric current can flow through a material and is the inverse of resistance. It is expressed in siemens (S), and mathematically, conductance (G) is calculated as G = 1 / R, where R is the resistance. This concept is foundational in circuit analysis, where understanding the relationship between resistance and conductance helps in designing and analyzing electrical circuits effectively.

Other options such as resistance, voltage, and current are related to electrical concepts but do not represent the reciprocal relationship to resistance. Voltage reflects the potential difference that drives current through a resistance, while current is the flow of electrons in a circuit.