railway RRB JE (CBT I + CBT II) Mock Test 2024 Analog Electronics Op-Amp and Its Applications

To obtain 30 % feedback factor, the correct relation between R1 and R2 is:

1
R1 = 3 R2
2
2R1 = 5R2
3
3R1 = 7R2
4
5R1 = 9R2
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