Which of the following is correct and why Filters If you hav

Which of the following is correct and why? (Filters)

If you have a low-pass filter with frequency cut-off of 40MHz, and a high-pass filter with frequency cut-off of 100MHz, what kind of filter do you obtain when you connect these two in series? A low-pass filter with 40MHz cut-off. No-pass filter (yes. this is a thing) A band-pass filter between 40MHz and 100MHz. A high-pass filter with 40MHz cut-off.

Solution

Answer: No pass filter.

Explanation: Low pass filter will allow signal with frequency less then 40 MHz and subsequently high pass filter will block this signal because it can allow signal with frequency greater then 100 MHz.