engineering recuitment GATE IN Test Series 2023-24 Mock Test Analog Electronics Op-Amp and Its Applications
The input impedance Zab for the circuit shown in the figure is _______
1
\(Z\left( {1 + \frac{{{R_2}}}{{{R_1}}}} \right)\)
2
\(\frac{Z}{{\left( {1 + \frac{{{R_2}}}{{{R_1}}}} \right)}}\)
3
\(\frac{{Z{R_2}}}{{\left( {1 + \frac{{{R_2}}}{{{R_1}}}} \right)}}\)
4
\(Z{R_2}\left( {1 + \frac{{{R_2}}}{{{R_1}}}} \right)\)