A. Second harmonic
B. Third harmonic
C. Fifth harmonic
D. Do not produce harmonics
A. Uninterruptible power supplies
B. Induction heating system
C. Constant voltage and frequency power supplies
D. All of these
A. 30° to 150°.
B. 30° to 180°.
C. 60° to 120°.
D. 60° to 180°.
A. One resistor across the string
B. Resistors of the same value across each SCR
C. Resistors of different values across each SCR
D. One resistor in series with each SCR
A. Unijunction device
B. Device with three junction
C. Device with four junction
D. None of the above
A. A switching pulse generator and a shorting pulse generator
B. A shorting pulse distributor
C. A switching and shorting pulse combination
D. All of these
A. gate signal is always present
B. gate signal must be removed
C. gate signal should present but can be removed
D. none of the above.