Determine the emf of the battery. (b) Determine the current in the circuit after one time constant has elapsed. (c) Determine the voltage across the inductor after one time constant has elapsed. (d) Determine the rate of change of the current after one time constant.

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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.