If a fixed amount of power is to be transmitted over a certain length with the fixed power loss then_____,

SSC JE Electrical 2018 with solution SET-1
If a fixed amount of power is to be transmitted over a certain length with the fixed power loss then_____,

The weight of the conductor required will be proportional to the voltage

The weight of the conductor required will be inversely proportional to the voltage and that of the power factor of the load

The weight of the conductor required will be inversely proportional to the square of the voltage and that of the power factor of the load

The weight of the conductor will be proportional to the square of the voltage and directly proportional to the power factor of the load.

The weight of the conductor required will be proportional to the voltage

The weight of the conductor required will be inversely proportional to the voltage and that of the power factor of the load

The weight of the conductor required will be inversely proportional to the square of the voltage and that of the power factor of the load

The weight of the conductor will be proportional to the square of the voltage and directly proportional to the power factor of the load.

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SSC JE Electrical 2018 with solution SET-1
A hysteresis Motor

Can not be run in reverse speed

Is not a self-starting motor

Is a constant speed motor

Need DC excitation

Can not be run in reverse speed

Is not a self-starting motor

Is a constant speed motor

Need DC excitation

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

Amplidyne

DC Separately excited generator

Rectifier

Metadyne

Amplidyne

DC Separately excited generator

Rectifier

Metadyne

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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
What will be the value of average power (in Watt) of a sinusoidal voltage applied across a series circuit is 20 sinωt V and the current flowing the circuit is 10 sin(ωt + 60)A?

60

100

50

80

60

100

50

80

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SSC JE Electrical 2018 with solution SET-1
On which of the following parameters the eddy current loss occurring in a material does not depend?

Magnetic flux Density

Susceptibility

The volume of the material

The frequency of variation of flux

Magnetic flux Density

Susceptibility

The volume of the material

The frequency of variation of flux

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SSC JE Electrical 2018 with solution SET-1
The primary and secondary windings of an Auto-transformer are

Both magnetically and electrically coupled

Electrically coupled

Magnetically coupled

None of these

Both magnetically and electrically coupled

Electrically coupled

Magnetically coupled

None of these

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SSC JE Electrical 2018 with solution SET-1

SSC JE Electrical 2018 with solution SET-1 If a fixed amount of power is to be transmitted over a certain length with the fixed power loss then_____,

SSC JE Electrical 2018 with solution SET-1 A hysteresis Motor

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

SSC JE Electrical 2018 with solution SET-1 What will be the value of average power (in Watt) of a sinusoidal voltage applied across a series circuit is 20 sinωt V and the current flowing the circuit is 10 sin(ωt + 60)A?

SSC JE Electrical 2018 with solution SET-1 On which of the following parameters the eddy current loss occurring in a material does not depend?

SSC JE Electrical 2018 with solution SET-1 The primary and secondary windings of an Auto-transformer are

SSC JE Electrical 2018 with solution SET-1
If a fixed amount of power is to be transmitted over a certain length with the fixed power loss then_____,

SSC JE Electrical 2018 with solution SET-1
A hysteresis Motor

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

SSC JE Electrical 2018 with solution SET-1
What will be the value of average power (in Watt) of a sinusoidal voltage applied across a series circuit is 20 sinωt V and the current flowing the circuit is 10 sin(ωt + 60)A?

SSC JE Electrical 2018 with solution SET-1
On which of the following parameters the eddy current loss occurring in a material does not depend?

SSC JE Electrical 2018 with solution SET-1
The primary and secondary windings of an Auto-transformer are