When two identical stage with upper cut off at ωh are cascaded,

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When two identical stage with upper cut off at ωh are cascaded, the overall 3 dB point is at:

1. ω_h
2. 2 ω_h
3. 0.5 ω_h
4. 0.64 ω_h

Correct Option: D

ω_h* = ω_h √2_1/n – 1
= ω_h √2_1/2 – 1 (since n = 2)
= ω_h √0·414
= 0.64 ω_h