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A stepper motor is

a two phase induction motor
is a kind of rotating amplifier
is an electromagnetic transducer used to convert an angular position of shaft into electrical signal
is an electromechanical device which actuates a train of step angular movements in response to a train of input pulses on one to one basis

Correct Answer: is an electromechanical device which actuates a train of step angular movements in response to a train of input pulses on one to one basis

Explanation:

When input pulses are applied, the motor moves in steps.

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