Question

If an inverting Op-Amp with \( R_f = 50~k\Omega \) and \( R = 200~k\Omega \) is reconfigured as non-inverting Op-Amp, then its voltage gain is

• A. 4 with phase inversion
• B. 5 without phase inversion
• C. 5 with phase inversion
• D. 4 without phase inversion

Hint:

Non-inverting gain is \( A_v = 1 + \frac{R_f}{R} \); no phase inversion occurs.

Answer 1

The Correct Option is B

Non-inverting amplifier gain: \[ A_v = 1 + \frac{R_f}{R} = 1 + \frac{200}{50} = 1 + 4 = 5 \] Non-inverting amplifiers do not introduce phase inversion.