Which of the following is the main advantage of an auto-transformer over a two winding transformer?
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Electrical Engineering · all questionsTransformers
Transformers
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Primary winding of a transformer
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Negative voltage regulation is indicative that the load is
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Which motor is preferred for use in mines where explosive gases exist?
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Which type of winding is used in 3phase shell-type transformer?
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The hum in a transformer is mainly attributed to
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An ideal transformer is one which has
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Noise level test in a transformer is a
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The 'crawling' in an induction motor is caused by
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Open circuit test on transformers is conducted to determine
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Short circuit test on transformers is conducted to determine
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In a certain transformer, the input power to the primary is 120 W. If 8.5 W are lost to the winding resistance, what is the output power to the load, neglecting any other issues?
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Which of the following acts as a protection against high voltage surges due to lightning and switching?
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The power factor of an induction motor under no-load conditions will be closer to
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Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is
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The path of a magnetic flux in a transformer should have
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The path of the magnetic flux in transformer should have
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The permissible flux density in case of cold rolled grain oriented steel is around
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No-load current of a transformer has
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Q100
Open questionIn a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of
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