a) HV winding of large rating trans-former b) HV winding of small rating trans-former c) LV winding of small rating trans-former d) LV winding of large rating trans-former Ans: (d)
a) Lower voltage and higher current b) Higher voltage and lower current c) Lower voltage and lower current d) Higher voltage and higher current Ans: (a)
a) Thick paper b) Thin mica sheet c) Thin coating varnish d) None of these Ans: (c)
a) Is equal to the resistance of the HV winding b) Is greater than the resistance of the HV winding c) Is less than the resistance of the HV winding d) Maybe either more or less han the resistance of the HV winding Ans: (c)
a) The difference in the number of primary and secondary turns b) Changing currents in the two win-dings c) Magnetic flux linkage between the two windings d) All of these Ans: (c)
a) The supply frequency b) Load current c) Mutual flux d) None of these Ans: (b)
a) Lenz’s law b) Faraday’s law c) Coulomb’s law d) Ampere’s law Ans: (a)
a) Increases b) Decreases c) Remains unchanged d) First increases and becomes constant Ans: (c)
a) Increasing the number of lamina-tions of core b) Changing the turns ratio c) Using the magnetic core lower reluctance d) None of these Ans: (c)
a) Leakage flux b) Common core flux c) Size of the core d) Permeability of the core material Ans: (b)