Two insulator discs of identical capacitance value C makes up a string for 2.2 kV, 50 Hz single phase overhead line insulating system. If the pin to earth capacitance is also C, then string efficiency is:

Two insulator discs of identical capacitance value C makes up a string

1.	Two insulator discs of identical capacitance value C makes up a string for 2.2 kV, 50 Hz single phase overhead line insulating system. If the pin to earth capacitance is also C, then string efficiency is:
A.	75 percent
B.	50 percent
C.	80 percent
D.	90 percent
Answer» B. 50 percent