Except for distribution transformers, power transformers are often made to be as powerful as possible around:
A. Half-load
B. No-load
C. Near full-load
D. 10% overload
A. Half-load
B. No-load
C. Near full-load
D. 10% overload
A. 800 W
B. 400 W
C. 1600 W
D. 6400 W
A. Sandwich type
B. Rectangular type
C. Cylindrical type
D. Circular type
A. Perfect DC isolation
B. Maximum efficiency
C. Constant amplitude voltage gain
D. Perfect DC isolation, maximum efficiency and constant voltage gain
A. 50kVA
B. 12kVA
C. 10kVA
D. 8kVA
A. Copper losses are negligible
B. Hysteresis losses are reduced
C. Eddy losses are totally eliminated
D. Saving in winding material
A. short circuit
B. circuit with finite reactance
C. open circuit
D. circuit with finite resistance
A. cool as there is no secondary current
B. hot because primary will carry heavy current
C. hot because of heavy iron losses
D. depends on other parameters
A. Radio interference test
B. Impedance test
C. Polarity test
D. Core insulation voltage test
A. More height and less height flexibility
B. Can be made with more height
C. Due to other reasons
D. Can be made with less height