SSC JE Electrical Engineering 4th March 2017 Shift-2

Instructions

For the following questions answer them individually

Question 81

A photocell is illuminated by a small bright source placed 1 m away. When the same source of light is placed two metres away, the electrons emitted by the photocathode _____.

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Question 82

In a vacuum tetrode secondary emission is because of emission of _____.

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Question 83

Which of the following circuit is mostly used as an amplifier?

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Question 84

In a dc compound motor, 4-point starter provided as _____.

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Question 85

The simplest form of a motor controller is _____.

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Question 86

The plugging provides ___________ braking torque in comparison to rheostatic and regenerative braking systems.

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Question 87

Dynamic braking is very effective if the dc motor _____.

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Question 88

In case of dc shunt motors, the regenerative braking is employed when the load _____.

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Question 89

The variable loss in a dc shunt machine is _____.

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Question 90

In a synchronous generator, a divided winding rotor is preferable to a conventional winding rotor because of _____.

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