The GATE Grind

GATE Engineering Mathematics: Complex Analysis – Previous Year Questions

12 GATE previous year questions on Complex Analysis (Engineering Mathematics, Electronics and Communication Engineering) with answers and explanations, from every paper.

  1. GATE 2015 EC Q14 (1 mark, Multiple choice) – Let z = x + iy be a complex variable. Consider that contour integration is performed along the unit circle in anticlockwise direction. Which one of…
  2. GATE 2016 EC Q38 (2 marks, Numerical answer) – In the following integral, the contour C encloses the points 2 j and -2 j. -12 C z(z - 2 j)3 \, dz The value of the integral is
  3. GATE 2018 EC Q61 (2 marks, Numerical answer) – The contour C given below is on the complex plane z=x+jy, where j=-1. The value of the integral 1 j Cdzz2-1 is .
  4. GATE 2019 EC Q11 (1 mark, Multiple choice) – Which one of the following functions is analytic over the entire complex plane?
  5. GATE 2019 EC Q26 (1 mark, Numerical answer) – The value of the contour integral 12 j(z+1z)2dz evaluated over the unit circle z =1 is .
  6. GATE 2021 EC Q36 (2 marks, Multiple choice) – Consider the integral C(x)x2(x2+4)\,dx where C is a counter-clockwise oriented circle defined as x-i =2. The value of the integral is
  7. GATE 2022 EC Q32 (1 mark, Numerical answer) – A simple closed path C in the complex plane is shown in the figure. If C2zz2-1\,dz=-i A, where i=-1, then the value of A is (rounded off to two…
  8. GATE 2023 EC Q13 (1 mark, Multiple choice) – Let w4=16j. Which of the following cannot be a value of w?
  9. GATE 2023 EC Q14 (1 mark, Multiple choice) – The value of the contour integral C(z+2z2+2z+2)dz, where the contour C is \z: z+1-32j =1\, taken in the counter clockwise direction, is
  10. GATE 2024 EC Q43 (2 marks, Multiple choice) – Let z be a complex variable. If f(z)=( z)z2(z-2) and C is the circle in the complex plane with z =3 then Cf(z)\,dz is .
  11. GATE 2025 EC Q52 (2 marks, Multiple select) – Which of the following statements involving contour integrals (evaluated counter-clockwise) on the unit circle C in the complex plane is/are TRUE?
  12. GATE 2026 EC Q36 (2 marks, Multiple choice) – Consider the two series, S A and S B, where S A= n=1n22n and S B=1+12+18+116+164+1128+1512+. Which of the following statements is correct for the two…