A. average value
B. r.m.s. value
C. maximum value
D. instantaneous value
Related Mcqs:
- The path of a magnetic flux in a transformer should have______________?
A. high resistance
B. high reluctance
C. low resistance
D. low reluctance - Hysteresis loss in a transformer varies as CBmax = maximum flux density) ?
A. Bmax
B. Bmax1-6
C. Bmax1-83
D. B max - The use of higher flux density in the transformer design____________?
A. reduces weight per kVA
B. reduces iron losses
C. reduces copper losses
D. increases part load efficiency - The leakage flux in a transformer depends upon______________?
A. load current
B. load current and voltage
C. load current, voltage and frequency
D. load current, voltage, frequency and power factor - The path of the magnetic flux in transformer should have____________?
A. high reluctance
B. low reactance
C. high resistance
D. low resistance - Which of the following is the main advantage of an auto-transformer over a two winding transformer?
A. Hysteresis losses are reduced
B. Saving in winding material
C. Copper losses are negligible
D. Eddy losses are totally eliminated - The changes in volume of transformer cooling oil due to variation of atmospheric temperature during day and night is taken care of by which part of transformer?
A. Conservator
B. Breather
C. Bushings
D. Buchholz relay - The maximum efficiency of a distribution transformer is____________?
A. at no load
B. at 50% full load
C. at 80% full load
D. at full load - In a transformer the resistance between its primary and secondary is____________?
A. zero
B. 1 ohm
C. 1000 ohms
D. infinite - The permissible flux density in case of cold rolled grain oriented steel is around__________?
A. 1.7 Wb/m2
B. 2.7 Wb/m2
C. 3.7 Wb/m2
D. 4.7 Wb/m2
