Hysteresis loss in a transformer varies as CBmax = maximum flux density) ?

No-load current of a transformer has_____________?

A. has high magnitude and low power factor
B. has high magnitude and high power factor
C. has small magnitude and high power factor
D. has small magnitude and low power factor

In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are__________?

A. hysteresis and eddy current losses
B. friction and windage losses
C. copper losses
D. none of the above

A transformer core is laminated to__________?

A. reduce hysteresis loss
B. reduce eddy current losses
C. reduce copper losses
D. reduce all above losses

In a power or distribution transformer about 10 per cent end turns are heavily insulated__________?

A. to withstand the high voltage drop due to line surge produced by the shunting capacitance of the end turns
B. to absorb the line surge voltage and save the winding of transformer from damage
C. to reflect the line surge and save the winding of a transformer from damage
D. none of the above

Which winding in a transformer has more number of turns ?

A. Low voltage winding
B. High voltage winding
C. Primary winding
D. Secondary winding

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?

A. Its secondary current is 5 A
B. Its secondary voltage is 400 V
C. Its rating is 2 kVA
D. Its secondary current is 20 A
E. It is a step-up transformer