Computational Electromagnetics – MCQs – EE

1. Computational electromagnetics is used to:
(A) Solve Maxwell’s equations numerically
(B) Step response only
(C) Measure line resistance
(D) Only design transformers

2. Finite Difference Time Domain (FDTD) method is based on:
(A) Frequency domain solution only
(B) Time-stepping of Maxwell’s equations
(C) Step response only
(D) Load flow analysis

3. Finite Element Method (FEM) divides the domain into:
(A) Infinite elements
(B) Discrete finite elements
(C) Step response only
(D) Only line sections

4. Method of Moments (MoM) is primarily used for:
(A) Solving integral equations for electromagnetic problems
(B) Step response only
(C) Only AC analysis
(D) Load flow only

5. In FDTD, the computational grid is called:
(A) Yee grid
(B) Step response only
(C) Finite mesh only
(D) Load flow grid

6. Boundary conditions in computational electromagnetics are used to:
(A) Define field behavior at domain edges
(B) Step response only
(C) Only line voltage
(D) Load flow only

7. Absorbing boundary conditions are applied to:
(A) Minimize reflections from domain boundaries
(B) Step response only
(C) Only reactive power
(D) Load shedding

8. Computational electromagnetics can be applied to:
(A) Antenna design, scattering analysis, and waveguides
(B) Step response only
(C) Only load flow
(D) RMS voltage measurement

9. FEM requires:
(A) Meshing of the geometry and solving system equations
(B) Step response only
(C) Only line current analysis
(D) Load shedding

10. MoM converts:
(A) Integral equations into a system of linear algebraic equations
(B) Step response only
(C) Only differential equations
(D) Load flow only

11. In FDTD, stability is governed by:
(A) Courant–Friedrichs–Lewy (CFL) condition
(B) Step response only
(C) Only mesh size
(D) Load flow only

12. Computational electromagnetics is essential for:
(A) Predicting EM field distributions in complex structures
(B) Step response only
(C) Only voltage regulation
(D) Load flow only

13. FEM is well-suited for:
(A) Complex geometries and inhomogeneous materials
(B) Step response only
(C) Only uniform lines
(D) Load flow only

14. FDTD method calculates fields:
(A) At discrete points in space and time
(B) Step response only
(C) Only voltage magnitudes
(D) Load flow only

15. Computational electromagnetics can solve:
(A) Radiation, scattering, and propagation problems
(B) Step response only
(C) Only transformer modeling
(D) Load flow only

16. MoM is commonly used for:
(A) Antenna and scattering problems
(B) Step response only
(C) Only AC load flow
(D) RMS voltage calculation

17. In FDTD, time step size affects:
(A) Stability and accuracy
(B) Step response only
(C) Only load flow
(D) Voltage profile

18. Mesh refinement in FEM improves:
(A) Solution accuracy
(B) Step response only
(C) Only frequency response
(D) Load shedding

19. Absorbing boundaries in FDTD prevent:
(A) Artificial reflections at the domain edges
(B) Step response only
(C) Only current spikes
(D) Load flow errors

20. CEM techniques are used in EE to:
(A) Design antennas, filters, and EM compatibility studies
(B) Step response only
(C) Only line load flow
(D) Voltage measurement

21. FEM requires solving:
(A) Large sparse matrix equations
(B) Step response only
(C) Only line current equations
(D) Load shedding

22. Time-domain methods like FDTD are useful for:
(A) Broadband EM analysis
(B) Step response only
(C) Only single-frequency analysis
(D) Load flow only

23. Frequency-domain CEM methods include:
(A) Method of Moments (MoM) and FEM
(B) Step response only
(C) Only FDTD
(D) Load flow only

24. Computational electromagnetics helps in:
(A) Reducing trial-and-error in EM design
(B) Step response only
(C) Only voltage monitoring
(D) Load flow only

25. Key challenges in CEM include:
(A) Large-scale problems and high computational cost
(B) Step response only
(C) Only line voltage calculations
(D) Load shedding

26. FEM, FDTD, and MoM are:
(A) Numerical methods for EM analysis
(B) Step response only
(C) Only analog simulation techniques
(D) Load flow tools

27. In MoM, unknown quantities are expanded using:
(A) Basis functions
(B) Step response only
(C) Only voltage measurements
(D) Load flow only

28. Perfectly matched layer (PML) is used to:
(A) Absorb outgoing waves in numerical simulations
(B) Step response only
(C) Only current measurement
(D) Load flow only

29. FDTD and FEM require:
(A) Discretization of the computational domain
(B) Step response only
(C) Only line measurements
(D) Load shedding

30. Advantages of computational electromagnetics include:
(A) Predicting EM behavior in complex structures without physical prototypes
(B) Step response only
(C) Only line impedance measurement
(D) Load flow only