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Rectifiers and Converters

Rectifiers and Converters
Which of the following mercury arc rectifier will deliver least undulating current?

Two-phase
Six-phase
Three-phase
Single-phase

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Rectifiers and Converters
Normally, which of the following is used, when a large-scale conversion from AC. to D.C. power is required?

Mercury arc rectifier
Motor converter
Rotary converter
Motor-generator set

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Rectifiers and Converters
A commutating rectifier consists of commutator driven by

A synchronous motor
A D.C. series motor
An induction motor
A D.C. shunt motor

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Rectifiers and Converters
The voltage drop at anode, in a mercury arc rectifier is due to

energy spent in overcoming the electrostatic field
self restoring property of mercury
high temperature inside the rectifier
high ionization potential

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Rectifiers and Converters
The advantage of mercury arc rectifier is that

it has high efficiency
it is comparatively noiseless
it is light in weight and occupies small floor space
All of the listed here

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Rectifiers and Converters
In a glass bulb mercury arc rectifier the maximum current rating is restricted to

2000 A
500 A
1500 A
200 A

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