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Rectifiers and Converters

Rectifiers and Converters
In a single phase rotary converter the number of slip rings will be

Six
Three
Two
Four

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Rectifiers and Converters
In a phase-shift control method, the phase shift between anode and grid voltages can be achieved by means of

Synchronous generator
Synchronous motor
Shunt motor
Induction regulator

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Rectifiers and Converters
It is the_______of the transformer on which the magnitude of angle of overlap depends.

leakage reactance
resistance
capacitance
all of the listed here

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

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

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Rectifiers and Converters
Copper oxide rectifier is usually designed not to operate above

45°C
30°C
75°C
55°C

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Rectifiers and Converters
In which of the following equipment direct current is needed?

Telephones
Time switches
Relay
All of the listed here

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