An Op-Amp has a Gain Bandwidth Product of 1 MHz. At what frequency will the gain of this Op-Amp be equal to unity? Identify from the options given below.

Correct option is D

​​$$\text{Gain} \times \text{Bandwidth} = \text{Constant}$$

$$\text{Gain} \times \text{Bandwidth} = 1 \, \text{MHz}$$

$$\text{Given that Gain} = 1, \text{we calculate the frequency} (f):$$

$$\text{Bandwidth (BW)} = f_2 - f_1$$

$$\text{BW} = \frac{1 \, \text{MHz}}{\text{Gain}}$$

$$\text{BW} = \frac{1 \times 10^3}{1} \, \text{KHz}$$

$$\text{BW} = 1000 \, \text{KHz}$$​​​​​​​​