DGVCL Exam Paper (11-12-2011)
Ybus used in power flow studies and Zbus used in short circuit studies

Are transpose of each other
Are inverse of each other
Are the same
Have no inter relation

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DGVCL Exam Paper (11-12-2011)
Due to skin effect

Uniform current flows through the conductor
Portion of the conductor near the surface carries less current and the core of the conductor carries more current
Portion of the conductor near the surface carries more current and the core of the conductor carries less current
Current flows through the half cross section of the conductor

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DGVCL Exam Paper (11-12-2011)
The purpose of skewing of rotor slots in an induction motor is

To increase the breadth factor
To reduce the magnetic hum of the motor
To increase the distributuion factor
To reduce the locking tendency of the rotor

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