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An amplifier without feedback has a gain of 1000. The gain with a negative feedback of 0.009 is—
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- 100
- 10
- 900
- 125
Correct Option: A
| Af = | where Af = gain after feedback | 1 + Aβ |
| = | A = gain before feedback | 1 + 1000 × .009 |
| = | = 100 β = negative feedback factor | 1 + 9 |
Hence alternative (A) is the correct answer.
