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An op-amp is open-loop gain of 105 and open-loop upper cut-off frequency of 10 Hz. If this OP-AMP is connected as an amplifier with a closed-loop gain at 100, then new uper cut-off frequency will be
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- 10 Hz
- 100 Hz
- 10 kHz
- 100 kHz
Correct Option: C
Upper cut-off frequency at closed loop gain
= fo × (1 + βA) = 10 × 100 = 10 kHz
