cylindrical solenoid with 2,000 turns, a radius of 6.00 cm, and a length of 40.0 cm is initially turned off. When the solenoid is turned on, the current increases to 8.45 A in a time of 0.120 s. What is the EMF induced in the solenoid?   a. 10.0 volts   b. 7.50 volts   c. 5.00 volts   d. 12.5 volts   e. 2.50 volts

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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.