A. Current transformer
B. Potential transformer
C. Power transformer
D. SCR
A. DIAC conducts in forward direction and TRIAC conducts in reverse direction
B. Both conducts in forward direction
C. Both conducts in reverse direction
D. Both conducts in either direction
A. Time domain
B. Frequency domain
C. Either A. or B.
D. None of these
A. Positive voltage at the gate terminal
B. Negative voltage at the gate terminal
C. Either (a) or (b)
D. None of these
A. Square
B. Sinusoidal
C. Triangular
D. Saw – tooth
A. A capacitor
B. A variable resistor
C. An inductor
D. Only (a) and (b)
A. Top switch of each leg is on at any instant
B. Bottom switch of each leg is on at any instant
C. Either A. or B.
D. None of these
A. Lighting and heating control
B. On – line transformer tap changing
C. Soft starting
D. All of these
A. Equal to the average power supplied by the dc source
B. Greater than the average power supplied by the dc source
C. Lesser than the average power supplied by the dc source
D. Equal to the average power supplied by the ac source