While measuring the phase difference between the signals v1(t) = 10 sin ωt and v2(t) = 10 sin (ωt + ϕ), the Lissajous pattern observed on CRO is a circle. The value of ϕ is:

While measuring the phase difference between the signals v1(t) = 10 si

1.	While measuring the phase difference between the signals v1(t) = 10 sin ωt and v2(t) = 10 sin (ωt + ϕ), the Lissajous pattern observed on CRO is a circle. The value of ϕ is:
A.	2π
B.	π
C.	π/2
D.	π/4
Answer» D. π/4