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The value of C required for sinusoidal oscillation of frequency 1 kHz in the circuit shown below:
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1 µF 2µ - 2π µF
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1 µF 2µ√6 - 2π √6 µF
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Correct Option: A
The given circuit represents the wien bridge oscillator.
| The ratio | must be greater than 2 for oscillation to start. | |
| R1 |
| Since here ratio | = | = 2.1 > 2 | ||
| R1 | 1 |
so there will oscillation and frequency of oscillation
| f = | ||
| 2πRC |
| 1 × 103 = | ||
| 2π × 1 × 103 × C |
| or C = | × 106 F | |
| 2π |
| or C = | µF | |
| 2π |
