A transformer has 100 turns in its primary coil and 2000 turns in its secondary coil. The emf in the primary is 12 V and the total resistance in the secondary is 1000 ohm calculate (i) the emf in the secondary coil. (ii) the current in the secondary coil, (iii) the current in the primary coil. Assume that the transformer is ideal.

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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.