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WorksheetsMATLAB Basics and Transmission Lines Quiz
Total questions: 20
Worksheet time: 10mins
What is the MATLAB command to compute the square root of 25?
sqrt(25)
root(25)
sqr(25)
^0.5(25)
In a single-phase transmission line, what is the primary factor affecting resistance (R)?
Conductor material resistivity and cross-sectional area
Spacing between conductors
Permittivity of the medium
Frequency of the current
How do you create a vector in MATLAB from 1 to 10 with a step of 1?
1:10
vector(1,10)
[1 to 10]
range(1,10)
What is the unit of inductance (L) in transmission lines per unit length?
Henry per meter (H/m)
Ohm per meter (Ω/m)
Farad per meter (F/m)
Siemens per meter (S/m)
What MATLAB function creates a 4x4 identity matrix?
eye(4)
identity(4)
ones(4)
zeros(4)
In single-phase transmission line parameters, what does GMR stand for?
Geometric Mean Radius
Geometric Mean Resistance
Global Magnetic Radius
Ground Mean Radius
How do you compute the natural logarithm of 10 in MATLAB?
log(10)
ln(10)
log10(10)
natural_log(10)
For a single-phase transmission line, the capacitance (C) formula involves which constant?
ε₀ (permittivity of free space)
μ₀ (permeability of free space)
ρ (resistivity)
σ (conductivity)
What is the result of matrix multiplication in MATLAB for A = [1 2; 3 4] * [2; 1]?
[4; 10]
[2 1; 6 4]
[3; 5]
Error
Why is GMR used instead of the actual radius in inductance calculations?
To account for non-uniform current distribution and internal flux
To simplify resistance formulas
To calculate capacitance more accurately
To include ground effects
Which MATLAB command plots y = sin(x) for x from 0 to 2π?
x=0:0.1:2*pi; plot(x, sin(x))
plot(sin(0:2*pi))
sin_plot(0,2*pi)
x=0:2*pi; plot(sin(x))
In transmission lines, inductance (L) increases with increasing what?
Spacing between conductors (D)
Conductor radius (r)
Line length (l)
Resistivity (ρ)
How do you find the sum of elements in a vector v = [1 2 3] in MATLAB?
sum(v)
total(v)
add(v)
v.sum()
What is the typical value of μ₀ (permeability of free space) used in inductance formulas?
4π × 10^{-7} H/m
8.85 × 10^{-12} F/m
1.72 × 10^{-8} Ωm
3 × 10^8 m/s
What is a simple for-loop in MATLAB to print numbers 1 to 5?
for i=1:5, disp(i); end
loop i=1 to 5, print(i)
while i<=5, disp(i)
for i in 1:5, print(i)
For single-phase lines, capacitance (C) decreases with increasing what?
Spacing D
Radius r
Permittivity ε₀
Length l
How do you generate 50 random numbers between 0 and 1 in MATLAB?
rand(1,50)
random(50)
randn(50)
uniform(0,1,50)
In transmission line parameters, what is neglected in overhead lines for simplicity?
Conductance (G)
Resistance (R)
Inductance (L)
Capacitance (C)
What MATLAB function computes the mean of a vector x?
mean(x)
average(x)
sum(x)/length(x)
Both a and c
For bundled conductors in transmission lines, GMR is calculated as the geometric mean of what?
Distances between sub-conductor centers
Radii of individual conductors
Resistivities of materials
Spacings to ground
