LCR frequency response & quality | A.C. | Physics | Khan Academy

The frequency response graph is a graph of current vs frequency, keeping all other variables a constant. For LCR circuits, the graph has a peak at the resonant frequency. This is used to tune radios and other devices to specific radio frequency channels. A high-quality LCR resonance has a narrow graph, while a low-quality has a flatter graph - the sharpness determines the quality.
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this is series resonance or current resonance

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how does the frequency change by changing the L&C, I know the rule says that but how?
does the frequency of the whole source changes for changing the resistance as example ?
Isn't it something that the source makes by a value bec of its specifications or what??

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The frequency of the receiver gets changed, the source has a constant frequency

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Its resonance frequency that is changed by changing L and C.All frequency like 98.7,92.3 are available all time but radio selects frequency thats equal to resonace frequency

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How do you change the frequency???

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By either changing self inductance (L) or capacitance (C)

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When ever you rotate the nob in fm
1) distance between plates in capacitor changes and number of turns of inductor changes.
So, automatically capacitance (c)changes due to change in distance between plates
And Inductance (L) due to change in number of turns of inductor
2)

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