1. . All physical quantities in electromagnetics are functions of:
(A) Time only
(B) Space only
(C) Both space and time
(D) Neither space nor time
2. . To describe spatial variations of quantities in space, we need:
(A) A graph
(B) A suitable coordinate system
(C) A calculator
(D) A timer
3. . A point or vector can be represented in a:
(A) Only Cartesian coordinate system
(B) Any curvilinear coordinate system
(C) Only spherical coordinate system
(D) Only cylindrical coordinate system
4. . An orthogonal coordinate system is one in which:
(A) Coordinates are parallel
(B) Coordinates are mutually perpendicular
(C) Coordinates are curved
(D) Coordinates are imaginary
5. . Examples of orthogonal coordinate systems include:
(A) Cartesian, Circular/Cylindrical, Spherical
(B) Polar only
(C) Rectangular only
(D) None of these
6. . Choosing the best coordinate system for a problem:
(A) Wastes time
(B) Saves work and time
(C) Makes problems harder
(D) Is irrelevant
7. . A complicated problem in one coordinate system:
(A) Always stays complicated
(B) Can become easier in another system
(C) Cannot be solved
(D) Has no solution
8. . Sometimes it is necessary to:
(A) Avoid using coordinate systems
(B) Transform points and vectors from one system to another
(C) Use only Cartesian coordinates
(D) Use imaginary numbers
9. . A curvilinear coordinate system can be:
(A) Only orthogonal
(B) Only non-orthogonal
(C) Either orthogonal or non-orthogonal
(D) Neither orthogonal nor non-orthogonal
10. . The purpose of using a suitable coordinate system is to:
(A) Represent points and vectors uniquely in space
(B) Increase the complexity of calculations
(C) Avoid using vectors
(D) Represent only scalar quantities