The opposition to current flow referred to as?

• A. Inductance
• B. Capacitance
• C. Impedance
• D. Resistance

Answer: (D)

Opposition to current flow is called resistance. It is the property of a material that impedes electron movement, causing energy to be dissipated as heat. For a given voltage, higher resistance means less current, described by V = IR. In direct current, this resistance is the principal factor opposing flow. Inductance and capacitance describe other ways circuits respond to electrical signals: inductance resists changes in current, and capacitance resists changes in voltage. In alternating current, the total opposition is called impedance, which combines resistance with the reactive effects of inductance and capacitance.