A) This appears to be an electronic relay, possibly a general-purpose relay used in control systems. It has a transparent plastic casing, exposing the internal components like coils, contacts, and circuitry.
B) This is a transformer, specifically an EPCOS transformer with the model number 1116 0834 PA. It has a laminated core and windings, and pins for electrical connections.
C) This image shows a toroidal inductor or transformer, characterized by its donut-like shape with windings wrapped around a ring-shaped core. This design is often used for efficiency and to minimize electromagnetic interference.
D) This image shows a component that resembles a transformer or an inductor with a U-shaped core and windings. It seems to be partially disassembled or mounted in a way that exposes the coil.
E) This object is a large, multi-layered component with what looks like fins or plates arranged radially around a central shaft. It could be a type of variable capacitor, a high-voltage insulator, or a component related to power transmission or high-frequency applications. The large cylindrical end piece suggests a connection or termination point.