This page covers the design and behavior of solenoidal inductors and transformers, focusing on inductance properties affected by coil turns, gaps, and materials. It highlights the relationship between...This page covers the design and behavior of solenoidal inductors and transformers, focusing on inductance properties affected by coil turns, gaps, and materials. It highlights the relationship between inductance, stored energy, and design constraints, especially in air-wound and toroidal inductors. The text addresses circuit configurations, transformer operation, and mitigations against eddy currents in iron-core transformers.