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This set of Electromagnetics Multiple Choice Questions & Answers (MCQs) focuses on Electromagnetics Set 5
Q1 | The Cartesian system is also called as
- circular coordinate system
- rectangular coordinate system
- spherical coordinate system
- space coordinate system
Q2 | The volume of a parallelepiped in Cartesian is
- dv = dx dy dz
- dv = dx dy
- dv = dy dz
- dv = dx dz
Q3 | The scalar factor of Cartesian system is unity. State True/False.
- true
- false
Q4 | The spherical equivalent of the vector B = yi + (x + z)j located at (-2,6,3) is given by
- (7,64.62,71.57)
- (7,-64.62,-71.57)
- (7,-64.62,71.57)
- (7,64.62,-71.57)
Q5 | Which of the following criteria is used to choose a coordinate system?
- distance
- intensity
- magnitude
- geometry
Q6 | The cylindrical coordinate system is also referred to as
- cartesian system
- circular system
- spherical system
- space system
Q7 | Transform the vector B=yi+(x+z)j located at point (-2,6,3) into cylindrical coordinates.
- (6.325,-71.57,3)
- (6.325,71.57,3)
- (6.325,73.57,3)
- (6.325,-73.57,3)
Q8 | Cylindrical systems have the following scalar values respectively
- 1, ρ ,1
- 1, 1, 1
- 0,1,0
- 1,0,0
Q9 | A charge located at point p (5,30⁰,2) is said to be in which coordinate system?
- cartesian system
- cylindrical system
- spherical system
- space system
Q10 | Cylindrical system is employed in waveguides. State True/False.
- true
- false
Q11 | The pressure inside a piston cylinder is a variable of
- radius
- plane angle
- z plane distance
- constant, not a variable
Q12 | Charges filled inside a cylindrical will possess flux in which direction?
- upwards
- downwards
- laterally outwards
- inwards
Q13 | Rectangular waveguides dominate the circular waveguides. Find the reason.
- low cut-off frequency
- easy to design
- more wave propagation
- the statement is false
Q14 | Convert the point (3,4,5) from Cartesian to spherical coordinates
- (7.07,45⁰,53⁰)
- (0.707,45⁰,53⁰)
- (7.07,54⁰,63⁰)
- (0.707,54⁰,63⁰)
Q15 | Example of spherical system in the following is
- charge in space
- charge in box
- charge in dielectric
- uncharged system
Q16 | Spherical systems are employed in waveguides. State True/False
- true
- false
Q17 | Choose which of following condition is not required for a waveguide to exist.
- the dimensions should be in accordance with desired frequency
- cut-off frequency should be minimum 6ghz
- the shape should be spherical
- no specific condition is required for waveguide design
Q18 | Find the spherical coordinates of A(2,3,-1)
- (3.74, 105.5⁰, 56.13⁰)
- (3.74, 105.5⁰, 56.31⁰)
- (3.74, 106.5⁰, 56.13⁰)
- (3.74, 106.5⁰, 56.31⁰)
Q19 | Find the Cartesian coordinates of B(4,25⁰,120⁰)
- (0.845, 1.462, 3.625)
- (-0.845, 1.462, 3.625)
- (-8.45, 2.462, 6.325)
- (8.45, 2.462, 6.325)
Q20 | The area of sphere can be computed from the sphere volume. State True/False.
- true
- false
Q21 | Given B= (10/r)i+( rcos θ) j+k in spherical coordinates. Find Cartesian points at (-3,4,0)
- -2i + j
- 2i + k
- i + 2j
- –i – 2k
Q22 | The scalar factor of spherical coordinates is
- 1, r, r sin θ
- 1, r, r
- r, r, 1
- r, 1, r
Q23 | The permittivity is also called
- electrostatic energy
- dielectric constant
- dipole moment
- susceptibility
Q24 | Dielectric constant will be high in
- conductors
- semiconductors
- insulators
- superconductors
Q25 | Insulators perform which of the following functions?
- conduction
- convection
- provide electrical insulation
- allows current leakage at interfaces