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Maximum Power Dissipated - Analogue Electronics - Past Exam Paper, Exams of Electronics

Main points of this exam paper are: Total Resistance, Total Current, Circuit, Load Resistor, Power Transfer, Maximum Power Dissipated, Period, Frequency, Amplitude, Waveform

Typology: Exams

2012/2013

Uploaded on 03/25/2013

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EE106 Analogue Electronics, 2008/2009 Page 1 of 7
Autumn Examinations 2008/ 2009
Exam Code(s)
1BN, 1BP, 1BEE
Exam(s)
1st Electronic Engineering
1st Electronic & Computer Engineering
1st Sports and Exercise Engineering
Module Code(s)
EE106
Module(s)
Analogue Electronics
Paper No.
1
Repeat Paper
Yes
External Examiner(s)
Professor George Irwin
Internal Examiner(s)
Professor Gearóid ÓLaighin
Mr. Gavin Corley
Dr. Edward Jones
Instructions:
Answer all of question 1, and any 2 other questions
Question 1 is compulsory and carries 40 marks
Choose 2 questions from 2,3 & 4; each question
carries 30 marks
Duration
2 hours
No. of Pages
7 (including cover page)
Department(s)
Electrical & Electronic Engineering
Course Co-ordinator(s)
Gavin Corley
Requirements:
MCQ
Handout
Statistical Tables
Graph Paper
Log Graph Paper
Other Material
Standard Mathematical Tables
pf3
pf4
pf5

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Download Maximum Power Dissipated - Analogue Electronics - Past Exam Paper and more Exams Electronics in PDF only on Docsity!

Autumn Examinations 2008/ 2009

Exam Code(s) 1BN, 1BP, 1BEE

Exam(s) 1

st

Electronic Engineering

st

Electronic & Computer Engineering

st

Sports and Exercise Engineering

Module Code(s) EE

Module(s) Analogue Electronics

Paper No. 1

Repeat Paper Yes

External Examiner(s) Professor George Irwin

Internal Examiner(s) Professor Gearóid ÓLaighin

Mr. Gavin Corley

Dr. Edward Jones

Instructions: Answer all of question 1, and any 2 other questions

Question 1 is compulsory and carries 40 marks

Choose 2 questions from 2,3 & 4; each question

carries 3 0 marks

Duration 2 hours

No. of Pages 7 (including cover page)

Department(s) Electrical & Electronic Engineering

Course Co-ordinator(s) Gavin Corley

Requirements :

MCQ

Handout

Statistical Tables

Graph Paper

Log Graph Paper

Other Material Standard Mathematical Tables

Question 1 is compulsory

1. (a) For the circuit shown in Figure 1.1 calculate: (i) The total resistance of the circuit, RT [4 marks]

(ii) The total current IT, flowing in the circuit [1 marks]

Figure 1.

1. (b) For the circuit shown in Figure 1.2 calculate: (i) The value of the load resistor (RLoad) which will ensure maximum power transfer to the load. [3marks] (ii) The maximum power dissipated in RLoad [2 marks]

Figure 1.

1. (c) From the sawtooth waveform shown in Figure 1.3 calculate: (i) The period (T) of the waveform. [1 marks] (ii) The frequency (f) of the waveform. [1 marks] (iii) The DC offset of the waveform. [1 marks] (iv) The amplitude of the waveform. [1 marks] (v) The peak to peak value (Vp-p) of the waveform [1 marks]

Figure 1.

1. (g) Calculate the RMS current flowing in the circuit shown in figure 1.6 and specify the phase angle of the current: [5 marks]

Figure 1.

1. (h) Draw a complete circuit diagram of a half wave rectifier and briefly explain its operation.

[5 marks]

2. For the circuit of Figure 2:

(a) Calculate the current flowing in the 60Ω resistor due to the 50V voltage source. [7 marks]

(b) Calculate the current flowing in the 60Ω resistor due to the 20V voltage source. [7 marks]

(c) Calculate the current flowing in the 60Ω resistor due to the 3A current source. [7 marks]

(d) Using the principle of superposition, calculate the total current and power dissipated in the 60Ω resistor. [9 marks]

Figure 2

4. (a) Figure 4 shows a series connected RLC circuit.

(i) Determine the total impedance (Z) of the circuit. [5 marks]

(ii) Find the value of the capacitor in Farads and the inductor in Henries. [5 marks]

(iii) Calculate the magnitude of the supply current I , and voltages VR, VL,VC. [5 marks]

(iv) What is the average power delivered to the circuit? [5 marks]

Figure 4

(b) A smoothing capacitor is to be added to a half wave rectifier circuit with input: v( t ) = 10sin(120 πt ) and load resistance RL = 3kΩ.

(i) Calculate the value of the capacitance necessary in order to keep the ripple of the output voltage below 10%. [6 marks]

(ii) Plot two cycles of the smoothed output voltage waveform. Specify an approximation to the average output voltage when the smoothing capacitor is attached. [4 marks]