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The value of R in oscillator circuit shown in a given circuit below is chosen such that it oscillates at an angular frequency of ω. The value of ω and the required value of R will respectively be
  • a)
    105 rad/s and 2 x 104 Ω
  • b)
    2 x 10 4 rad/s and 2 x 104 ​Ω
  • c)
    2 x 10 4 rad/s and 10Ω
  • d)
    105 rad/s and 2 x 105 Ω
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The value of R in oscillator circuit shown in a given circuit below is...
Hartley oscillator

 
Amp with +ve F.B
Loop again AB = 1 + j0         
At oscillation
∠AB = 0 (no reactance XL = XC)
At frequency of oscillation look lies resistive Network

For ideal op amp

Use voltage division Rule
R + 1 = 21
R = 20 kΩ
R = 2 × 104Ω 
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The value of R in oscillator circuit shown in a given circuit below is chosen such that it oscillates at an angular frequency of ω. The value of ω and the required value of R will respectively bea)105rad/s and 2 x 104Ωb)2 x 104rad/s and 2 x 104​Ωc)2 x 104rad/s and 105Ωd)105rad/s and 2 x 105ΩCorrect answer is option 'A'. Can you explain this answer?
Question Description
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