Electronics and Communication Engineering - Signals and Systems - Discussion

5. 

In an ac circuit the fundamental component of current wave lags the corresponding voltage wave by 20°. The third harmonic component of current wave lags the corresponding voltage by an angle.

[A]. less than 20°
[B]. more than 20°
[C]. equal to 20°
[D]. equal to or more than 20°

Answer: Option B

Explanation:

For third harmonic θ = tan-1 = .


Engrafridi said: (Nov 18, 2015)  
How can any solve it?

Chaitu said: (Jan 5, 2017)  
How to solve this?

Dado said: (Mar 25, 2017)  
tan(θ)=n* first harmonic.
θ = tan^-1(3 * wL/R).

Dhinesh Kumar said: (Sep 2, 2017)  
How to get the WL/R?

Np Naresh said: (Sep 17, 2017)  
Explain briefly.

Ganesh said: (Oct 18, 2017)  
How to solve this one?

Saira Narasimha Reddy said: (Dec 30, 2019)  
Theta = tan inverse (XL/R)= 20°
When,
3rd hormonic theta = tan inverse (3XL/R) so,
Value of theta increased more than previous so,
More than angle 20°.

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