An AC series circuit has R = 6 Ω, XL = 20 Ω and Xc = 12 Ω. The ciruit power factor will be

DGVCL Exam Paper (11-12-2011)
An AC series circuit has R = 6 Ω, XL = 20 Ω and Xc = 12 Ω. The ciruit power factor will be

0.8 lagging

0.5 leading

0.6 lagging

0.6 leading

0.8 lagging

0.5 leading

0.6 lagging

0.6 leading

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DGVCL Exam Paper (11-12-2011)
In a series RLC circuit at resonance

Current is maximum and power factor is 0.5

Current is maximum and power factor is unity

Current is minimum and power factor is unity

Current is minimum and power factor is 0.5

Current is maximum and power factor is 0.5

Current is maximum and power factor is unity

Current is minimum and power factor is unity

Current is minimum and power factor is 0.5

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DGVCL Exam Paper (11-12-2011)
The purpose of embedding the damper winding in the pole face of a synchronous motor is to

Reduce bearing friction

Eliminate hunting and provide adequate starting torque

Eliminate losses on account of fair friction

Reduce winding losses

Reduce bearing friction

Eliminate hunting and provide adequate starting torque

Eliminate losses on account of fair friction

Reduce winding losses

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

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

Have no inter relation

Are the same

Are transpose of each other

Are inverse of each other

Have no inter relation

Are the same

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DGVCL Exam Paper (11-12-2011)
The purpose of interpoles in DC machines is to nullify

The reactance voltage

The cross-magnetizing effect of armature mmf

Both the cross-magnetizing mmf and the reactance voltage

The demagnetizing effect of armature mmf

The reactance voltage

The cross-magnetizing effect of armature mmf

Both the cross-magnetizing mmf and the reactance voltage

The demagnetizing effect of armature mmf

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DGVCL Exam Paper (11-12-2011)
An IDMT relay provides

An inverse time current characteristic

An inverse characteristic for low values of the fault current and a definite time characteristic for high values of the fault current

A definite time characteristic for low values of the failt current and an inverse characteristic for high values of the fault current

A definite time cuttent characteristic

An inverse time current characteristic

An inverse characteristic for low values of the fault current and a definite time characteristic for high values of the fault current

A definite time characteristic for low values of the failt current and an inverse characteristic for high values of the fault current

A definite time cuttent characteristic

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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011) An AC series circuit has R = 6 Ω, XL = 20 Ω and Xc = 12 Ω. The ciruit power factor will be

DGVCL Exam Paper (11-12-2011) In a series RLC circuit at resonance

DGVCL Exam Paper (11-12-2011) The purpose of embedding the damper winding in the pole face of a synchronous motor is to

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

DGVCL Exam Paper (11-12-2011) The purpose of interpoles in DC machines is to nullify

DGVCL Exam Paper (11-12-2011) An IDMT relay provides

DGVCL Exam Paper (11-12-2011)
An AC series circuit has R = 6 Ω, XL = 20 Ω and Xc = 12 Ω. The ciruit power factor will be

DGVCL Exam Paper (11-12-2011)
In a series RLC circuit at resonance

DGVCL Exam Paper (11-12-2011)
The purpose of embedding the damper winding in the pole face of a synchronous motor is to

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

DGVCL Exam Paper (11-12-2011)
The purpose of interpoles in DC machines is to nullify

DGVCL Exam Paper (11-12-2011)
An IDMT relay provides