A very long, straight solenoid with a cross-sectional area of 2.40 cm² is wound with 86.5 turns of wire per centimeter. Starting at t = 0, the current in the solenoid is increasing according to i (t) = (0.168 A/s²)t². A secondary winding of 5.0 turns encircles the solenoid at its center, such that the secondary winding has the same cross-sectional area as the solenoid.

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Q: A star is 16.6 light-years from Earth. ▼ Part A How long would it take a spacecraft traveling 0.950c…

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Electromagnets

The word "electromagnet" is composed of two words, ‘electro’ and ‘magnet’. It is a type of magnet in which an electric current helps in the generation of a magnetic field. Electromagnets usually consist of two major parts, wire and a coil around which the wire is wound. This is called a solenoid. When an electric current is allowed to pass through the coiled wire, the electric current produces a magnetic field. This magnetic field is present only when current is passing through the wire.