Electrical Engineering Answers

Correct the mistakes in the following python programme then save the corrected code in the Word file by copying and pasting it.

a = input(("Type a number here: ")

x = float(a)

b = input("Type another number here: "))

y = float(b)

if a > b:

    print("the number " + str(x)+ " is bigger than the number" + str(y))

elseif a == b:

    print("the numbers are equal")

else:

    print("the number " +str(x)+ " is smaller than the number " + str(b))

Correct the following python programme. then save the corrected code in the Word file by copying and pasting it.

X = int(input(“please enter an integer value : “)

Y = int(input(“Please enter another integer value:  “)

a = int(x)

b = int(y)

z = a%x

print(z)

Write a python programme to take two inputs of two different numbers (float) from the user pointed at

by two variables x and y respectively.

 Add the numbers and have the result in the variable z.

 Print the text “The total of two numbers is” concatenated with the sum of the numbers “z” after

changing it by ‘str’ into string form.

(i)Let U₁ = (p(x) = P₁: p(x)is even) and U₂ {p(x) E P3: p(x)is odd). Can we claim that U₁ U₂ = P3? (ii)Let A be an n x n matrix and A can be factored

as ABC, where Bis an n x p matrix and Cis a px n matrix with np. Can the matrix A be invertible? Justify your answer.

Use linearity and the assumption that 𝑉0=1 𝑉, find the actual value of 𝑉0

Two power stations, A and B, are synchronized at 88 kV. They are interconnected by a transmission line with an inductive reactance of 5.7 Ω and resistance of 1.3 Ω. The voltage of power station A is advanced with an angle of 7.8 degrees with respect to the voltage of power station B. The loading of power station B has a real power of 312.31 MW. The respective loads of the two power stations are as follows:

Power station A: 700 MVA at a power factor of 0.819 lagging.

Power station B: The reactive power consumed by the load is 412 Mvar.

Use the complex power method to calculate the interconnector current  (I_ij) in kA in polar form

In a three-phase, four-wire system, the currents in lines A, B and C under abnormal conditions of loading were as follows:

 I_a = 100∠ 30°  A;            I_b=50∠ 300° A ;    and       I_c=30∠ 180 ^° A.

 Determine the zero-phase sequence current  (I_ao) in line A in polar form.  

An unbalanced, three-phase, three-wire, star-connected load is supplied from a balanced three-phase source at 380 V,50 Hz. The phase sequence impedances of the load are the following:  

Z_a =17.5 ∠ - 34.2°Ω ;               Z_b=13.9 ∠ 68.15° Ω  ;               Z_c =14.2 ∠ - 49.7° Ω 

Take E_ab as a reference, with a phase sequence of ACB.

Use Millman’s theorem and determine the phase voltage (I_c) of the load in polar form.

raw the filter of the equation x(t) given below. Design the filter using a Butterworth filter. Verify the filter design and adjust n as needed. - Test the filter and explain what you get? x(t) = 3 sin(51130t)+ 15cos(61250t)

A 208 V, 60 Hz, 4 poles, star connected SCIM gave the following test results

N.L. test: 450W, 208V, 1.562A, B.R. Test : 59.4W, 27V, 2.77A

The stator winding resistance between any two terminals=2.4Ω.

a. Compute the equivalent circuit parameters of the motor.

b. Determine the shaft torque and the efficiency of the motor if it is running at its rated speed of

1710rpm.