What is inductance in an electrical circuit?

What is inductance in an electrical circuit?

• A. Inductance is the property of an electrical conductor (usually a coil) that opposes a change in current by generating an induced EMF.
• B. Inductance is the measure of resistance to current flow in a conductor.
• C. Inductance is the rate of energy consumption in a circuit.
• D. Inductance is the amount of charge stored in a capacitor.

Answer: (A)

Inductance is the property of a conductor, usually a coil, that opposes changes in current by generating an induced EMF. This induced voltage acts in a direction to oppose the change in current, described mathematically as V = L di/dt. The energy stored in the magnetic field of an inductor is (1/2) L I^2. Inductors resist rapid changes in current and, in AC circuits, cause a phase difference between voltage and current; their reactive effect increases with frequency (X_L = 2π f L). This behavior is different from resistance, which simply dissipates energy as heat, and from a capacitor, which stores energy as electric charge.

Inductance is the property of a conductor, usually a coil, that opposes changes in current by generating an induced EMF. This induced voltage acts in a direction to oppose the change in current, described mathematically as V = L di/dt. The energy stored in the magnetic field of an inductor is (1/2) L I^2. Inductors resist rapid changes in current and, in AC circuits, cause a phase difference between voltage and current; their reactive effect increases with frequency (X_L = 2π f L). This behavior is different from resistance, which simply dissipates energy as heat, and from a capacitor, which stores energy as electric charge.