Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is

Related MCQs

• The voltage transformation ratio of a transformer is equal to the ratio of
• The full-load copper loss of a trans¬former is 1600 W. At half-load, the copper loss will be
• 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
• Reduction in core losses and increase in permeability are obtained with transformer employing
• Losses which occur in rotating electric machines and do not occur in trans formers are
• In a given transformer for given applied voltage, losses which remain constant irrespective of load changes are
• During short circuit test iron losses are negligible because
• In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are
• When a given transformer is run at its rated voltage but reduced frequency, its
• Which of the following statements regarding an idel single-phase transformer having a turn ratio of 1 : 2 and drawing a current of 10 A from 200 V A.C. supply is incorrect ?