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Rectifiers and Converters

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

1500 A
2000 A
200 A
500 A

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Rectifiers and Converters
Selenium rectifier can be operated at temperatures as high as

40°C
60°C
25°C
75°C

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Rectifiers and Converters
The advantage of mercury arc rectifier is that

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

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Rectifiers and Converters
The metal rectifiers are preferred to valve rectifiers due to which of the following advantages ?

They do not require any voltage for filament heating
None of the listed here
Both of the listed here
They are mechanically strong

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Rectifiers and Converters
Mercury, in arc rectifiers, is chosen for cathode because

Its atomic weight is quite high
Its boiling point and specific heat are low
All of the listed here
Its ionization potential is relatively low

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Rectifiers and Converters
In a mercury pool rectifier, the voltage drop across its electrodes

is inversely proportional to load
varies exponentially with the load current
is almost independent of load current
is directly proportional to load

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MORE MCQ ON Rectifiers and Converters

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