Passive Care Exam 1 Electrical Stimulation Practice Test

What is the ability of a material to store a charge?

Capacitance Resistance Inductance Conductance

Correct Answer:

Capacitance

Explanation:

Capacitance describes how much electric charge a system can hold for a given voltage. It follows Q = C V, so the charge stored increases with the capacity C. In practical terms, a capacitor stores energy in the electric field between two conductors separated by a dielectric; increasing plate area or using a material with a higher dielectric constant raises capacitance. The unit is the farad. The other properties describe how current behaves: resistance is opposition to current flow, inductance stores energy in a magnetic field when current changes, and conductance is the ease of current flow (the reciprocal of resistance). So the ability to store a charge is capacitance.

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