To convert mechanical energy into electrical energy, one can use 

(a) DC dynamo
(b) AC dynamo
(c) motor
(d) transformer

Choose the correct option 

1. (a) only

2. (b), (c) 

3. (a), (b) 

4. (a), (d) 

Subtopic:  AC Generator |
Level 3: 35%-60%
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