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DC shunt motor is still used instead of synchronous motor in _____________

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DC shunt motor is still used instead of synchronous motor in _____________

(a) High speed applications

(b) Low speed applications

(c) Medium and high-speed applications

(d) Everywhere

The question was posed to me during an internship interview.

Question is from Applications of DC Machines in section DC Machines of DC Machines

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Correct option is (b) Low speed applications

The explanation: At low speeds, DC shunt motors are comparable with synchronous motors. The outstanding feature of a DC shunt motor however is its superb wide range flexible speed control above and below the base speed using solid-state controlled rectifiers.

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