In Figure, after switch S is closed at time t = 0, the emf of the source is automatically adjusted to maintain a constant current i through S. a)Find the current through the inductor as a function of time. b)At what time is the current through the resistor equal to the current through the inductor?

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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.