1 Ky
Section A:
Network Theorems
(28 marks)
Question 1
Superposition's Theorem
(4 marks)
a) Using the superposition theorem, determine and analyse the current through
resistor Ra for the network shown below:
72 R
DAL
BLOLU 90
12 2
E =
36.1
R, Boni
9A
P
(2 marks)
b) Demonstrate that the superposition theorem analysis is not applicable to power
levels
(2 marks)

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?

Determine the damped natural frequencies and the steady state response of a decoupled damped forced two degrees of freedom system. 10ä1 + 2q1 20q1 10 cos t; 10q2 +4q2 + 40q2 10 cos t