Physics · DC Motors

A DC series motor should never be started under a no-load condition because:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1The back EMF will drop to zero permanently
2Excessive sparking will immediately damage the commutator
3The motor speed will rise to a dangerously high level✓
4The starting current will be dangerously high

Correct answer

The motor speed will rise to a dangerously high level

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