jangyasinniTeacher
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THD = √(V_r^2 – V_1^2) / V_1
c
Explanation: THD is the ratio of rms value of all the harmonic components to the rms
value of the fundamental component.
Rms value of all the harmonic components V
H = (V
r
2 – V
1
2
)
1/2
THD = (V
r
2 – V
1
2
)
1/2
/ V
1
.