To produce cathode spot in a mercury arc rectifier
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Electrical Engineering · all questionsRectifiers And Converters
Rectifiers And Converters
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A synchronous converter can be started
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In a single phase rotary converter the number of slip rings will be
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Which of the following rectifiers have been used extensively in supplying direct current for electroplating?
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In a three-phase mercury arc rectifiers each anode conducts for
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Ageing of a selenium rectifier may change the output voltage by
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In a rotary converter I2R losses as compared to a D.C. generator of the same size will be
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Which of the following rectifiers are primarily used for charging of low voltage batteries from AC. supply?
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The efficiency of the copper oxide rectifier seldom exceeds
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A rotary converter combines the function of
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In a glass bulb mercury arc rectifier the maximum current rating is restricted to
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A rotary converter in general construction and design, is more or less like
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The applications of selenium rectifiers are usually limited to potential of
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The metal rectifiers are preferred to valve rectifiers due to which of the following advantages ?
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In a mercury arc rectifier characteristic blue luminosity is due to
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Copper oxide rectifier is usually designed not to operate above
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In mercury arc rectifiers having grid, the arc can be struck between anode and cathode only when the grid attains a certain potential, this potential being known as
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Which of the following are the applications of D.C. system?
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Glass rectifiers are usually made into units capable of D.C. output (maximum continuous rating) of
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Which of the following AC. motors is usually used in large motor-generator sets?
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