1.

A single phase ac regulator fed from 50 Hz system supplies a load having resistance and inductance of 4.0 ohms and 12.73 mH respectively. The control range of firing angle is

A. 0 < < 180
B. 45 < < 180
C. 90 < < 180
D. 0 < < 45
Answer» C. 90 < < 180


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