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Solution


Q.

The essential difference between an A.C. generator and a D.C. generator is that:
1 A.C. generator has an electromagnet while a D.C. generator has permanent magnet.  
2 D.C. generator will generate a higher voltage.  
3 A.C. generator will generate a higher voltage.  
4 A.C. generator has slip rings while the D.C. generator has a commutator.  

Ans.

(4)

Most essential difference between A.C. generator and D.C. generator is using slip ring in A.C. generator and commutator in D.C. generator.