Electromagnetic question Consider a toroid with a cross-section area of 3.2 cm² and an effective radius of 14.5 cm. The coil wound around the toroid consists of N = 2,777 turns. The toroid core is comprised of two semi-circular segments, with circular cross-sections, and there is a 0.65 mm air gap at each joint. The left semicircle is made of a steel material with a relative permeability of mr-st = 4,077, while the right semicircle is made of a linear material with a relative permeability of mr = 196. Determine the coil current I required to generate a flux density of 1 T in the core.

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Solenoids

A solenoid is a common term for a telephone coil used as an electromagnet. It also refers to any device that uses a solenoid to convert electrical energy into mechanical energy. The device generates a magnetic field from an electric field and uses the magnetic field to produce precise motion. Solenoid valves are often used to change power, such as in-car transmitters or valves, such as in the fuel system.