Question 42
Electromagnetic InductionTo convert an alternating current dynamo into a direct current dynamo, the
- A.number of turns in the coil is increased
- B.strength of the field magnet is increased
- C.slip rings are replaced with a split ring commutator
- D.coil is wound on a soft iron armature.
Show the answer and explanation
Answer: C (slip rings are replaced with a split ring commutator)
Explanation
A split-ring commutator reverses the connections every half turn, so the output current always flows the same way.