If a Nyquist plot of G (jÏ‰) H (jÏ‰) for a closed loop system passes through (-2, j0) point in GH plane, what would be the value of gain margin of the system in dB?

If a Nyquist plot of G (jÏ‰) H (jÏ‰) for a closed loop system p

1.	If a Nyquist plot of G (jÏ‰) H (jÏ‰) for a closed loop system passes through (-2, j0) point in GH plane, what would be the value of gain margin of the system in dB?
A.	0 db
B.	2.0201 db
C.	4 db
D.	6.0205 db
Answer» E.