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Power Electronics

Q1:

In a 3 phase full wave regulator feeding resistance load connected in star, the possible range of firing angle a is

A 0 ≤ a ≤ 180°

B 0 ≤ a ≤ 150°

C 0 ≤ a ≤ 120°

D 0 ≤ a ≤ 90°

ANS:B - 0 ≤ a ≤ 150°

Since output voltage is zero if a ≥ 150°, the possible range of firing angles is 0 ≤ a ≤ 150°.



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