The argument of the complex number Q. 3 (A) (C) 2 Civila 1-i where i=-1, is (B) 2 (D) T Q. 4 dx The matrix form of the linear system = dt =3x-5y and dy dt = 4x+8y is (A) d [3 - -5x == dt y 48 (C) d dt d [38 X (B) = dt 4 - d = (D) = 38 8 ||y dt y 4-5 [y] 4 8 ][ x ] 3-5 -5y Q. 5 Which one of the following describes the relationship among the three vectors, i+j+k, 2 +3j+k and 51 +6+4k ? (A) The vectors are mutually perpendicular (B) The vectors are linearly dependent (C) The vectors are linearly independent (D) The vectors are unit vectors ur m Q. 6 A circular rod of length 'L' and area of cross-section 'A' has a modulus of elasticity 'E' and coefficient of thermal expansion 'a'. One end of the rod is fixed and other end is free. If the temperature of the rod is increased by AT, then (A) stress developed in the rod is E a AT and strain developed in the rod is a AT (B) both stress and strain developed in the rod are zero (C) stress developed in the rod is zero and strain developed in the rod is a AT (D) stress developed in the rod is E a AT and strain developed in the rod is zero