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← ScienceWhich condition occurs with increased back EMF in asynchronous motors?
A)Decreased stator magnetic field strength
B)Increased rotor slip frequency occurs✓
C)Commutator arcing risk increases sharply
D)Oversized capacitive current predominates slowly
💡 Explanation
Increased back EMF opposes stator current; therefore, the rotor slows until induced rotor current and torque rise via increased rotor frequency slip sufficient to balance the load, rather than magnetic field strength decreasing directly or unrelated arcing.
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