Question Paper: Applied Mathematics 4 : Question Paper May 2013 - Electronics & Telecomm. (Semester 4) | Mumbai University (MU)
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## Applied Mathematics 4 - May 2013

### Electronics & Telecomm. (Semester 4)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks.
1 (a) Prove that:
(5 marks)
1 (b) Show that matrix
is derogatory
(5 marks)
1 (c) Evaluate the following:
where C is |z-1| = 1
(5 marks)
1 (d) Evaluate AB(3x2y - 2xy)dx + (x3 - x2)dy along y2 = 2x3 from A(0,0) and B(2,4)(5 marks) 2 (a) Prove that: xJ'n(x) = -nJn(x) + xJn-1(x)(6 marks) 2 (b) Show that the matrix:
is diagonalizable.
Also find the transforming and diagonal matrix.
(7 marks)
2 (c) Evaluate ∬(∇×F). ds where F = (2x - y + z)i + (x + y - z2)j + (3x - 2y + 4z)k and 'S' is the surface of the cylinder x2 + y2 = 4 bounded by the plane z = 9 and open at the other end.(6 marks) 3 (a) Evaluate the following:
where C is:
(i)|z - 2 - i| = 2
(ii)|z - 1 - 2i| = 2
(7 marks)
3 (b) Show that F = (yexy cos z)i + (xexycos z)j - (exysin z)k is irrotational and find the scalar potential for F and evaluate ∫F.ds along the curve joining the points (0, 0, 0) and (-1, 2, π)(7 marks) 3 (c) Prove that:
(6 marks)
4 (a) Define analytic function. State and prove Cauchy-Reimann equation in polar co-ordinates.(7 marks) 4 (b) Verify Divergence Theorem; evaluate for F = 2xi + xyj - zk over the region bounded by the cylinder x2 + y2 = 4, z = 0, z = 6(7 marks) 4 (c) find A100
(6 marks)
5 (a) Define conformal mapping. Find Bilinear transformation which maps the points z = 0, i, -1 onto w = i, 1, 0.(7 marks) 5 (b) Evaluate the following:
(7 marks)
5 (c) Find the characteristic roots and characteristic vectors of A3+1 (6 marks) 6 (a) Expand the following:
(i) |z| < 1; (ii) 1 < |z| < 2; (iii) |z| > 2
(7 marks)
6 (b) if f(z) = u + iv is analytic and find f(z)(7 marks) 6 (c) Verify Cayley Hamilton Theorem for
and hence find the matrix 2A5 - 3A4 + A2 - 4I
(6 marks)
7 (a) Prove that the circle |z| = 1 in the z-plane is mapped onto the cardiode in the w-plane under the transformation w=z2+2z(7 marks) 7 (b) Reduce the following quadratic form to canonical form and find its rank and signature:
(7 marks)
7 (c) Verify Green's Theorem for
where c is boundary of the region defined by x = 1, x = 4, y = 1, y = √x
(6 marks)