Class 7 Science e-Book's MCQs - Complete
Electric Motors MCQs App & e-Book Download - 10
Apps:
MCQ 10: To make the coil keep rotating, the current is reversed after every half turn by a device called
- brush
- commutator
- mutator
- carbon spring
b
Class 7 Science App & e-Book Tests PDF Download
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7th Grade Science MCQs eBook Download
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