The London College

Programme - Higher National Certificate/Diploma in Engineering

Unit Number and Title - Unit 19: Electrical and Electronic Principles

Assignment Title - Electrical and Electronic Fundamentals

Unit Learning Outcomes
LO1: Apply an understanding of fundamental electrical quantities to evaluate simple circuits with constant voltages and currents. LO2: Evaluate simple circuits with sinusoidal voltages and currents.
LO3: Describe the basis of semiconductor action, and its application to simple electronic devices.
LO4: Explain the difference between digital and analogue electronics, describing simple applications of each.

Assignment Brief and Guidance

Scenario:

You are presented with the following tasks by the company where you train. The electric network company must carry out these tasks within a specified time limit and most importantly with the highest of standards and proficiency. To prove to the company that you are the right person to work for it you must carry out these tasks with utmost efficiency and professionalism and within the specified time limit. All the tasks involve solving AC and DC networks using the theory and practical experiences you acquired in your modules. All the tasks must be handed in one report which must be clearly and professionally presented.

LO1 Apply an understanding of fundamental electrical quantities to analyse simple Circuits with constant voltages and currents.

a. Apply and plot ohms law and determine the slope of an I-V curve (Refer to the lab experiment dc on ohm's law)
b. Apply Kirchhoff's voltage and current laws to analyse the circuit in the experiment (refer to lab experiment dc on Kirchhoff's voltage and current laws).
c. Validate Kirchhoff's laws against the practical results obtained in task1 b

d. Evaluate Thevenin's theorem through simulations and through theory (refer to lab experiment dc on Thevenin theorem and maximum power transfer).

LO2 Analyse simple circuits with sinusoidal voltages and currents

A series circuit comprises an inductor of 80 mH, a resistor of 200 ? and a capacitor of 22 uF. If a sinusoidal current of 40mA at 50hz flows in the circuit of fig 1,

a. Determine :
i. Voltage dropped across the resistor

ii. Voltage dropped across the capacitor

iii. Voltage dropped across the inductor

iv. The impedance of the circuit

v. The supply voltage

vi. The current in the circuit

vii. the phase angle

b. Draw phasor diagram for the RLC AC circuit in fig 1 and critically evaluate your results

LO3 Describe the basis of semiconductor action, and its application to simple electronic devices

a. Demonstrate the action of the following semiconductor devices.
i. Diode

ii. Zener diode

iii. Transistor as switch

b. Describe and evaluate range of discrete semiconductor devices in terms of simple semiconductor theory, suggesting appropriate applications
c. Critically evaluate the performance of Bipolar and FET transistors in terms of simple semiconductor theory, suggesting appropriate applications for each.

LO4 Explain the difference between digital and analogue electronics, describing simple applications of each

a. Briefly describe the difference between digital and analogue electronics. Illustrate your answer with examples.

b. Determine practically the Truth table for the following combinational logic gates in Fig 2.

c. Name the logic function in each case.

d. Describe the advantages and disadvantages of both analogue and digital electronics.

e. Explain the relative applications of both analogue and digital electronics
f. Critically evaluate the applications of analogue and digital electronics in terms of their relative advantages, explaining with examples where each might be applied

 Learning Outcomes and Assessment Criteria Pass Merit Distinction LO1 Apply an understanding of fundamental electrical quantities to analyse simple circuits with constant voltages and currents D1 Apply the principles of circuit theory to complex circuits, with constant sources, explaining and evaluating the operation of that circuit. P1 Apply the principles of circuit theory to simple circuits with constant sources, to explain the operation of that circuit. M1 Apply the principles of circuit theory to a range of circuits with constant sources, to explain the operation of that circuit. LO2 Analyse simple circuits with sinusoidal voltages and currents D2 Critically analyse the principles of circuit theory as applied to complex circuits, with sinusoidal sources, explaining and evaluating the operation of that circuit. P2 Analyse the principles of circuit theory as applied to simple circuits with sinusoidal sources, to explain the operation of that circuit. M2 Analyse the principles of circuit theory to a range of more complex circuits with sinusoidal sources, to explain the operation of that circuit. LO3 Describe the basis of semiconductor action, and its application to simple electronic devices D3 Critically evaluate the performance of a range of discrete semiconductor devices in terms of simple semiconductor theory, suggesting appropriate applications for each. P3 Describe the behaviour of a p-n junction in terms of semiconductor behaviour.   P4 Demonstrate the action of a range of semiconductor devices. M3 Describe and evaluate a range of discrete semiconductor devices in terms of simple semiconductor theory. LO4 Explain the difference between digital and analogue electronics, describing simple applications of each D4 Critically evaluate the applications of analogue and digital electronics in terms of their relative advantages, explaining with examples where each might be applied. P5 Explain the difference between digital and analogue electronics.   P6 Explain amplifier characteristics.   P7 Explain the operation of a simple circuit made of logic gates. M4 Describe the relative applications and benefits of analogue and digital electronics, explaining with examples where each might be applied.

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