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

For the op-amp circuit shown the current through the diode is:

1
\(\frac{{{V_i}}}{R}\)
2
-Vi/R
3
\({I_0}\left( {{e^{\frac{{{V_i}}}{{n{V_T}}}}} - 1} \right)\)
4
\({I_0}\left( {{e^{\frac{{ - {V_i}}}{{n{V_T}}}}} - 1} \right)\)
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