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Electrical control systems

61. In a stable control system saturation can cause which of the following ?

Low-level oscillations
High-level oscillations
Conditional stability
Overdamping
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Detailed SolutionIn a stable control system saturation can cause which of the following ?

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62. Phase margin of a system is used to specify which of the following ?

Frequency response
Absolute stability
Relative stability
Time response
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Detailed SolutionPhase margin of a system is used to specify which of the following ?

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63. Transfer function of a system is used to calculate which of the following ?

The order of the system
The time constant
The output for any given input
The steady state gain
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Detailed SolutionTransfer function of a system is used to calculate which of the following ?

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64.

universal motor
single phase induction motor
servomotor is basically a A. universal motor B. single phase induction motor C. two phase induction motor
three phase induction motor
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Detailed Solution

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65. In a system low friction coefficient facilitates

Reduced velocity lag error
Increased velocity lag error
Increased speed of response
Reduced time constant of the system
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Detailed SolutionIn a system low friction coefficient facilitates

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66. Mass, in force-voltage analogy, is analogous to

charge
current
inductance
resistance
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Detailed SolutionMass, in force-voltage analogy, is analogous to

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67. The transient response, with feedback system,

rises slowly
rises quickly
decays slowly
decays quickly
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Detailed SolutionThe transient response, with feedback system,

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68. As a result of introduction of negative feedback which of the following will not decrease?

Band width
Overall gain
Distortion
Instability
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Detailed SolutionAs a result of introduction of negative feedback which of the following will not decrease?

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69. The viscous friction co-efficient, in force-voltage analogy, is analogous to

charge
resistance
reciprocal of inductance
reciprocal of conductance E. none of the above
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Detailed SolutionThe viscous friction co-efficient, in force-voltage analogy, is analogous to

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70. For open control system which of the following statements is incorrect ?

Less expensive
Recalibration is not required for maintaining the required quality of the output
Construction is simple and maintenance easy
Errors are caused by disturbances
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Detailed SolutionFor open control system which of the following statements is incorrect ?

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