Tellegen’s theorem is based on the principle of law of_______

SSC JE Electrical 2018 with solution SET-1
Tellegen’s theorem is based on the principle of law of_______

Conservation of Velocity

Conservation of charge

Conservation of Mass

Conservation of Energy

Conservation of Velocity

Conservation of charge

Conservation of Mass

Conservation of Energy

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SSC JE Electrical 2018 with solution SET-1
Which of the following is a static exciter?

DC Separately excited generator

Amplidyne

Metadyne

Rectifier

DC Separately excited generator

Amplidyne

Metadyne

Rectifier

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An AC or DC generator requires direct current to energize its magnetic field. The DC field current is obtained from a separate source called an exciter. Either rotating or static-type exciters are used for AC power generation systems. There are two types of rotating exciters: brush and brushless. The primary difference between brush and brushless exciters is the method used to transfer DC exciting current to the generator fields. Static excitation for the generator fields is provided in several forms including field-flash voltage from storage batteries and voltage from a system of solid-state components. DC generators are either separately excited or self-excited.
EXCITATION SYSTEMS in current use include direct-connected or gear-connected shaft-driven DC generators, belt-driven or separate prime mover or motor-driven DC generators, and DC supplied through static rectifiers.
Static Excitation System
As the name indicates, all the components in this type of excitation system are static. A set of rectifiers is fed from a transformer that steps down the main generator or auxiliary bus voltage. The rectifiers supply the main generator excitation current directly through slip rings and they may be controlled or uncontrolled.

An external source of DC is necessary for the initial excitation of the field windings. On engine-driven generators, the initial excitation may be obtained from the storage batteries used to start the engine or from control voltage at the switchgear.
The main advantage of the static exciter is improved response as the field current is controlled directly by the thyristor rectifier but, of course, if the generator terminal voltage is depressed too low then excitation power will be lost. It is again possible to provide the power supply from both voltage and current transformers at the generator terminals but it is doubtful whether the improved response of the static exciter over a permanent magnet brushless scheme can be justified for many small embedded generators.

SSC JE Electrical 2018 with solution SET-1
Calculate the value of the resonant frequency (in kHz) of a tank circuit having the capacitance of 0.01 mF and inductance of 0.01 mH?

15.91

0.1591

159.1

1.591

15.91

0.1591

159.1

1.591

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SSC JE Electrical 2018 with solution SET-1
Determine the value of produced mmf (in Amp-turns) in a coil if the coil has a 120 turns carrying a current of 0.1 A

16

12

18

14

16

12

18

14

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SSC JE Electrical 2018 with solution SET-1
In cables, the thickness of the layer of insulation on the conductor depends upon

Current carrying capacity

Power Factor

Voltage

Reactive Power

Current carrying capacity

Power Factor

Voltage

Reactive Power

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SSC JE Electrical 2018 with solution SET-1
Determine the magnetic field strength (in A/m) of a material when the intensity of magnetization of the material is 0.084 Amp/m and the magnetic susceptibility of the material is 0.0012

70

700

0.7

0.07

70

700

0.7

0.07

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SSC JE Electrical 2018 with solution SET-1

SSC JE Electrical 2018 with solution SET-1 Tellegen’s theorem is based on the principle of law of_______

SSC JE Electrical 2018 with solution SET-1 Which of the following is a static exciter?

SSC JE Electrical 2018 with solution SET-1 Calculate the value of the resonant frequency (in kHz) of a tank circuit having the capacitance of 0.01 mF and inductance of 0.01 mH?

SSC JE Electrical 2018 with solution SET-1 Determine the value of produced mmf (in Amp-turns) in a coil if the coil has a 120 turns carrying a current of 0.1 A

SSC JE Electrical 2018 with solution SET-1 In cables, the thickness of the layer of insulation on the conductor depends upon

SSC JE Electrical 2018 with solution SET-1 Determine the magnetic field strength (in A/m) of a material when the intensity of magnetization of the material is 0.084 Amp/m and the magnetic susceptibility of the material is 0.0012

SSC JE Electrical 2018 with solution SET-1
Tellegen’s theorem is based on the principle of law of_______

SSC JE Electrical 2018 with solution SET-1
Which of the following is a static exciter?

SSC JE Electrical 2018 with solution SET-1
Calculate the value of the resonant frequency (in kHz) of a tank circuit having the capacitance of 0.01 mF and inductance of 0.01 mH?

SSC JE Electrical 2018 with solution SET-1
Determine the value of produced mmf (in Amp-turns) in a coil if the coil has a 120 turns carrying a current of 0.1 A

SSC JE Electrical 2018 with solution SET-1
In cables, the thickness of the layer of insulation on the conductor depends upon

SSC JE Electrical 2018 with solution SET-1
Determine the magnetic field strength (in A/m) of a material when the intensity of magnetization of the material is 0.084 Amp/m and the magnetic susceptibility of the material is 0.0012