A stepper motor is a two phase induction motor is a kind of rotating amplifier i

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Question
A stepper motor is
Options
A. a two phase induction motor
B. is a kind of rotating amplifier
C. is an electromagnetic transducer used to convert an angular position of shaft into electrical signal
D. 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.

Automatic Control Systems problems

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2. In a CE amplifier the input impedance is equal to the ratio of
Options
A. ac base voltage to ac base current
B. ac base voltage to ac emitter current
C. ac emitter voltage to ac collector current
D. ac collector voltage to ac collector current

3. Gain of the amplifier is 'A'. Then the I/P impedance and O/P impedance of the closed loop amplifier shown below would be
Options
A.
B.
C.
D.

4. Consider the following statements : A clamper circuit
1. adds or subtracts a dc voltage to a waveform
2. does not change the waveform
3. amplifiers the waveform
Which are correct?
Options
A. 1, 2
B. 1, 3
C. 1, 2, 3
D. 2, 3

7. In the given figure the input is x(t) = A sin ?t. The steady state output y(t) =
Options
A. A sin (?t + ?) where ? = tan^-1 |G(j?)|
B. |G(j?)| A sin [?t + ?G(j?)]
C. |G(j?)| A sin [2?t + ?G(j?)]
D. A G(j?) sin [?t + ?G(j?)]

9. The system in the given figure, has
Options
A. good gain and phase margin
B. poor gain and phase margin
C. good gain margin but poor phase margin
D. poor gain margin but good phase margin

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