MCQOPTIONS
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MCQOPTIONS
| 1. |
What is a commutator in DC machines? |
| A. | electrical device which reverses the current direction between the rotor and external circuit |
| B. | mechanical device which reverses the current direction between the rotor and external circuit |
| C. | electrical device which allows the current flow between the rotor and external circuit |
| D. | mechanical device which allows the current flow between the rotor and external circuit |
| Answer» B. mechanical device which reverses the current direction between the rotor and external circuit | |