What is the major difference between the simple alternator and most practical alternators?

The major difference between the Simple alternator and Practical alternators are as follows :

Simple alternator
Practical alternators
 1. In a simple alternator, a small voltage is produced.
1. In the most practical alternator, a large voltage is produced
2. Coil rotates.
2. Coil is fixed.
3. Magnet is fixed.3.  Magnet rotates.
4. It is used in cars and bicycles as dynamos.4. It is used in powerhouses.


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