A. shunt motor
B. synchronous motor
C. induction regulator
D. synchronous generator
A. maximum grid voltage
B. critical grid voltage
C. any of the above
D. none of the above
A. Copper oxide rectifier is a linear device
B. Copper oxide rectifier is not a perfect rectifier
C. Copper oxide rectifier has a low efficiency
D. Copper oxide rectifier finds use in control circuits
E. Copper oxide rectifier is not stable during early life
A. magnitude
B. polarity
C. phase
D. any of the above
E. none of the above
A. They are mechanically strong
B. They do not require any voltage for filament heating
C. Both (A) and (B)
D. None of the above
A. 10°C
B. 20°C
C. 30°C
D. 45°C
A. 5 to 10 per cent
B. 15 to 20 per cent
C. 25 to 30 per cent
D. none of the above
A. 90 to 95%
B. 85 to 90%
C. 80 to 85%
D. 65 to 75%
A. 25°C
B. 40°C
C. 60°C
D. 75°C
A. 10 V
B. 30 V
C. 60 V
D. 100 V
E. 200 V