Hysteresis loss in a transformer varies as (Bmax = maximum flux density)
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Transformers
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The no load current in a transformer lags behind the applied voltage by an angle of about
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The efficiency of two identical transformers under load conditions can be determined by
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For a transformer, operating at constant load current, maximum efficiency will occur at
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Helical coils can be used on
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Greater the secondary leakage flux
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A transformer core is laminated to
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In the transformer following winding has got more cross-sectional area
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The transformer laminations are insulated from each other by
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Buchholz's relay gives warning and protection against
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If R2 is the resistance of secondary winding of the transformer and K is the transformation ratio then the equivalent secondary resistance referred to primary will be
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Two transformers operating in parallel will share the load depending upon their
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Which of the following does not change in an ordinary transformer?
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When a given transformer is run at its rated voltage but reduced frequency, its
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Which of the following does not change in a transformer?
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The starting torque of a squirrel-cage induction motor is
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While conducting short-circuit test on a transformer the following side is short circuited
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During short circuit test iron losses are negligible because
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If a transformer is continuously operated the maximum temperature rise will occur in
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The primary coil of a transformer is connected to a 60 V ac source. The secondary coil is connected to a 330 Ω load. The turns ratio is 3:1. What is the secondary voltage?
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