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Choose which of following condition is not required for a waveguide to exist.
Answer: c Explanation: A waveguide need not be spherical, it has to be rectangular or circular, as it violates the propagation of the wave.
Answer: c
See lessExplanation: A waveguide need not be spherical, it has to be rectangular or circular, as it violates the propagation of the wave.
Spherical systems are employed in waveguides. State True/False
Answer: b Explanation: There is no waveguide designed spherically to avoid absorption, rather than propagation.
Answer: b
See lessExplanation: There is no waveguide designed spherically to avoid absorption, rather
than propagation.
Example of spherical system in the following is
Answer: a Explanation: From a point charge +Q, the electric field spreads in all 360 degrees. The calculation of electric field in this case will be spherical system. Thus it is charge in the space.
Answer: a
See lessExplanation: From a point charge +Q, the electric field spreads in all 360 degrees. The
calculation of electric field in this case will be spherical system. Thus it is charge in the
space.
Convert the point (3,4,5) from Cartesian to spherical coordinates
Answer: a Explanation: r = √(x2+y2+z2) = √50 = 7.07 Θ = cos-1(z/r) = cos-1(5/5√2) = 45⁰ Φ = tan-1(y/x) = tan-1(4/3) = 53⁰
Answer: a
Explanation: r = √(x2+y2+z2) = √50 = 7.07
Θ = cos-1(z/r) = cos-1(5/5√2) = 45⁰
Φ = tan-1(y/x) = tan-1(4/3) = 53⁰
See lessConvert the given rectangular coordinates A(2,3,1) into corresponding cylindrical coordinates
Answer: d Explanation: ρ = √(x2+y2) = √13 = 3.61 Φ = tan-1(y/x) = 56.31 z = 1 Thus, A = (3.61,56.31,1).
Answer: d
See lessExplanation: ρ = √(x2+y2) = √13 = 3.61
Φ = tan-1(y/x) = 56.31
z = 1
Thus, A = (3.61,56.31,1).
Transform the spherical system B = (10/r)i + (10cos θ)j + k into cylindrical form at (5, π/2, -2)
Answer: a Explanation: The equivalent cylindrical form is given by, B = (10sin θ/r + rcos2θ)i + j + (10cos θ/r –r sin θ cos θ)k At (5, π/2, -2), r = √(52+-22) = √29 sin θ = 5/√29 and cos θ = -2/√29 Thus, B = 2.467i + j + 1.167k.
Answer: a
Explanation: The equivalent cylindrical form is given by,
B = (10sin θ/r + rcos2θ)i + j + (10cos θ/r –r sin θ cos θ)k
At (5, π/2, -2), r = √(52+-22) = √29
See lesssin θ = 5/√29 and cos θ = -2/√29
Thus, B = 2.467i + j + 1.167k.
Rectangular waveguides dominate the circular waveguides. Find the reason.
Answer: b Explanation: Due to linear design, the desired dimensions can be easily constructed using rectangular waveguides than circular ones.
Answer: b
See lessExplanation: Due to linear design, the desired dimensions can be easily constructed
using rectangular waveguides than circular ones.
Charges filled inside a cylindrical will possess flux in which direction?
Answer: c Explanation: The flux due to the charges will act outside the cylinder. Since the cylinder possesses curved surfaces, it will flow laterally outwards.
Answer: c
See lessExplanation: The flux due to the charges will act outside the cylinder. Since the cylinder possesses curved surfaces, it will flow laterally outwards.
The pressure inside a piston cylinder is a variable of
Answer: c Explanation: Pressure varies up and down in a cylinder due to suction. Thus it is dependent on the z plane distance of the cylinder.
Answer: c
See lessExplanation: Pressure varies up and down in a cylinder due to suction. Thus it is
dependent on the z plane distance of the cylinder.
Cylindrical system is employed in waveguides. State True/False.
Answer: a Explanation: Cylindrical systems are employed in circular waveguides, whereas Cartesian systems are employed in rectangular waveguides
Answer: a
See lessExplanation: Cylindrical systems are employed in circular waveguides, whereas
Cartesian systems are employed in rectangular waveguides