Q3.Loop transfer function of a feedback system is Take the Nyquist contour in
the clockwise direction. Then, the Nyquist plot of G(s)H(s) encircles -1 + j0.
Q7.RA and RB are the input resistances of circuits as shown below. The circuits extend infinitely in the
direction shown. Which one of the following statements is TRUE?
Q8.Let the eigenvalues of a 2 x 2 matrix A be 1, -2 with eigenvectors x1 and x2 respectively. Then the eigenvalues and eigenvectors of the matrix A2 − 3A + 4I would, respectively, be