A) 400 W B) 800 W C) 1600 W D) 6400 W. Ans : (A)
A) 90 B) 95 % C) 95.5 % D) 99 %. Ans : (B)
A) It is same for operation B) It protects the primary circuit C) It avoids high voltage surges D) It avoids core saturation and high voltage induction. Ans : (D)
A) Output voltage fluctuation from no load to full load is least B) Output voltage fluctuation with power factor is the least C) Difference between primary and secondary voltage is maximum D) Difference between primary and secondary voltage is least. Ans : (A)
A) when higher efficiency is desired B) when the transformation ratio is small C) when copper losses are to reduced D) when operator is not available. Ans : (B)
A) 200 V B) 100 V C) 300 V D) Zero. Ans : (B)
A) 0.1 B) 0.01 C) 100 D) 1 Ans : (C)
A) Low voltage secondary B) Low voltage primary C) High voltage secondary D) No conclusion can be drawn on the basis of the information given. Ans : (A)
A) 0.707 B) Less than 1 C) More than 1 D) nearly equal to 1. Ans : (B)
A) blue B) pale green C) pale pink D) pale yellow. Ans : (A)