Question

The value of α in the pass band of constant k-low pass filter is?

(a) 2 cosh^-1⁡(fc/f)

(b) cosh^-1⁡⁡(fc/f)

(c) cosh^-1⁡(f/fc)

(d) 2 cosh^-1⁡(f/fc)

The question was asked in a job interview.

Enquiry is from Constant-K Low Pass Filter topic in division Filters and Attenuators of Network Theory

Answer 1

Right answer is (d) 2 cosh^-1⁡(f/fc)

To explain I would say: The value of α in the pass band of constant k-low pass filter is α = 2 cosh^-1⁡(f/fc).