21. Double fourier series analysis of PWM is
22. During the commutation period in 3 phase converter, overlap time is
23. For a buck converter to reduce the conduction losses in diode
24. For bidirectional operation of converters
25. For similar carrier and modulating signals, the line current used in CSI is
26. For sweptfrequency measurements, the input impedance of the mismatched transmission line would vary with frequency as the electrical length ofthe transmission line would
27. Harmonics in 3 phase inverters can be reduced by using
28. In a 3 phaseCSI, if the required line output voltages are balanced and 120 degreeout of phase, then the chopping angles are used to eliminate only theharmonics at frequencies
29. In a load commutated DC - DC chopper, the capacitor has a
30. In a three phase converter, the number of notches per cycle is
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