GATE EC 2014 Question Paper (15-Feb-2014) (Shift 1)

Consider the feedback system shown in the figure. The Nyquist plot of G(s) is also shown. Which one of the following conclusions is correct?

In code-division multiple access (CDMA) system with N = 8 chips, the maximum number of users who can be assigned mutually orthogonal signature sequences is _______.

The capacity of a Binary Symmetric Channel (BSC) with cross-over probability 0.5 is _______.

A two-port network has scattering parameters given ≤ft[ s ] = ≤ft[ {*20c {s_11}&{s_12}\\ {s_211}&{s_22} } ]. If the port 2 of the two-port is short-circuited, the s₁₁ parameter for the resultant one-port network is

The force or a point charge +Q kept at a distance of 'd' from the surface of an infinite grounded metal plate in a permittivity ϵ is