If P/Q=1, unknown resistance S=1000 and R could be varied from 0 to 100 then the bridge could be ___________

If P/Q=1, unknown resistance S=1000 and R could be varied from 0 to 1

1.	If P/Q=1, unknown resistance S=1000 and R could be varied from 0 to 100 then the bridge could be ___________
A.	A balanced circuit
B.	A rectified circuit
C.	An unbalanced circuit
D.	An identical circuit
Answer» D. An identical circuit