1.

IF_D1,_D2,_D3,_D4_ARE_THE_DISTORTION_PRODUCED_BY_SECOND,_THIRD,_FOURTH,_FIFTH_RESPECTIVELY_(OTHERS_ARE_INSIGNIFICANT)._THEN_TOTAL_HARMONIC_DISTORTION_IS___________?$

A. ‚àö(D1<sup>2</sup>+D2<sup>2</sup>+D3<sup>2</sup>+D4<sup>2</sup>)
B. ‚àö(D1<sup>2</sup>+D3<sup>2</sup>)
C. ‚àö(D2<sup>2</sup>+D4<sup>2</sup>)
D. ‚àö(D1<sup>2</sup>+D2<sup>2</sup>)
Answer» B. ‚Äö√Ñ√∂‚àö‚Ć‚àö‚àÇ(D1<sup>2</sup>+D3<sup>2</sup>)


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