railway RRB Technician Grade 1 Mock Test 2024 Analog Electronics Op-Amp and Its Applications

Find out (I4/I1) in the following circuit:

1
\(-\frac{R_{1}}{R_{4}}\left(1+\frac{R_{4}}{R_{4}}+\frac{R_{5}}{R_{2}}\right)\)
2
\(\frac{R_{1}}{R_{2}}\)
3
1
4
\(​\left(1+\frac{R_{2}}{R_{3}}\right)\)
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