Cutoff Freq. = 1/2piRC. Theoretical bandwidth = 5000 - 1000 (APP) = 4000 But when I do it practically Or simulate as in the pic Bandwidth = 10000(Around). I asked the teachers in my college they say I did the practicals wrong. Those teachers gave signatures to everyone in the class even when they got the answers as I had. Please help. The date for the journal submission are near.