Electromagnetics (ECE Perspective) – Multiple Choice Questions (MCQs)

1. 97. The unit of the Poynting vector S is:

   • A. Watts/meter²
   • B. Watts
   • C. Joules
   • D. Joules/meter²

2. 98. The propagation constant γ of a transmission line is given by:

   • A. √(ZY)
   • B. √(Z/Y)
   • C. √(Y/Z)
   • D. Z/Y

3. 99. The phase constant β of a uniform plane wave is related to its wavelength λ by:

   • A. β = 2πλ
   • B. β = λ/2π
   • C. β = 2π/λ
   • D. β = π/λ

4. 100. The wave equation for magnetic field H in a source-free region is:

   • A. ∇²H = 0
   • B. ∇²H = με∂²H/∂t²
   • C. ∇²H = με∂H/∂t
   • D. ∇²H = ε∂H/∂t

5. 101. The reflection coefficient for a perfectly matched load on a transmission line is:

   • A. 1
   • B. -1
   • C. 0
   • D. Infinity

6. 102. An open-circuited transmission line section of length λ/2 acts as an:

   • A. Open circuit
   • B. Short circuit
   • C. Inductor
   • D. Capacitor