An R = 220-Ω resistor, an L = 1.95-mH inductor, and a V = 10.5-V source are connected in a series circuit. The voltage source is switched on at time t = 0 and the current in the circuit starts to build up. (c)What is the voltage drop, in volts, across the resistor when the circuit reaches its steady-state?  (d)Determine the time, in microseconds, that is required for the current to reach 50% of its final value.

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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.