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GATE CSE 1987 | Question: 15a
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closed with the note: Electronics question..Plz add question here after checking the relevance @makhdoom ghaya

Fig. below shows the circuit diagram of a wien bridge oscillator using an op-amp.

The frequency of oscillation is given by $f= 1/2 \pi CR$. To have the system oscillate the ratio $R_{2}/R_{1}$ should be

  1. $0.5$
  2. $29$
  3. $2$
  4. Any value
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