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An ac series circuit contains a 20 ohm resistor, a capacitor of 0.75 micro farad, and an inductor of 120 mH. What frequency should be used to create a resonance condition

Answer :

Answer:

530.5 Hz

Explanation:

Given :

C=0.75 micro

L=120 mH

Reactance capacitor can be determined by

=[tex]\frac{1}{ wC}[/tex]

where c =capacitor

= [tex]\frac{1}{w*0.75*10^-6}[/tex]

Reactance inductor can be determined by

[tex]= w*L\\ = w*120*10^-3[/tex]

As they are in series so ,

[tex]\frac{1}{w*0.75*10^-6} =w*120*10^-3[/tex]

On solving these value we get

[tex]w=3333.33[/tex]

As we know that

f = [tex]\frac{w}{2*3.14}[/tex] =

530.5 Hz

The 530.5 Hz of frequency should be used to create a resonance condition.

Reactance capacitor is defined as the opposition to the voltage change across the element.  It is inversely proportional to the angular frequency and the capacitance.

[tex]\bold {X_C = \dfrac 1{\omega C}}[/tex]

Where,

Xc = Reactance

[tex]\bold {\omega }[/tex] - angular frequency

C - capacitance.

so,

[tex]\bold {Xc = \dfrac 1 {\omega \times 0.75x10^-^6}}[/tex]

Reactance of the inductor,

[tex]\bold {X_L = \omega \times L}[/tex]

[tex]\bold {X_L = \omega \times 120x 10^-^3}[/tex]

Since, both are in series,

So,

[tex]\bold { \dfrac 1 {\omega \times 0.75x10^-^6} = \omega \times 120x 10^-^3} }}\\\\\bold {\omega = 3333.33}[/tex]

So, frequency

[tex]\bold {f = \dfrac w{2\times 3.14} = 530.5\ hz }[/tex]

Therefore, the 530.5 Hz of frequency should be used to create a resonance condition.

To know more about Reactance capacitor,

https://brainly.com/question/15493043

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