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Small universal commutator motors use series wound excitation. These motors are designed to operate on either direct current (DC) or single-phase alternating current (AC) supply. This versatility is a key feature of universal motors, allowing them to be used in a wide range of household appliances, such as vacuum cleaners, hand-held power tools, and kitchen appliances, where the supply available is typically AC, but the characteristics of a DC motor are desirable.
b
Explanation: The excitation which is provided is the series excitation in the small
universal commutator motors. The type of supply provided is dc or ac supply