Transformers

its power factor will deteriorate

its power factor will increase

its power factor will remain unaffected

its power factor will be zero

on full-load

on overload

on leading power factor

on zero power factor

copper loss

magnetising current

magnetising current and loss

efficiency of the transformer

temperature rise

dielectric strength of oil

voltage ratio

copper loss

$${{ ext{B}}_{max }}$$

$${{ ext{B}}_{max }}^{1.6}$$

$${{ ext{B}}_{max }}^{1.85}$$

$${{ ext{B}}_{max }}^{2.4}$$

Circular type

Sandwich type

Cylindrical type

Rectangular type

decreases the rotor current

increases the rotor current

rotor current becomes zero

rotor current rernains same

eddy current loss will decrease

eddy current loss will increase

eddy current loss will remain unchanged

none of the above

Overfluxing protection

Buchholz relay

Overcurrent protection

All of the above

reduce hysteresis loss

reduce eddy current losses

reduce copper losses

reduce all above losses