Assignment Title : Assign 1 Analysis of electrical circuits with constant voltages/currents sources

Unit Learning Outcomes & Assessment Criteria

L01 Apply an understanding of fundamental electrical quantities to analyse simple circuits with constant voltages and currents

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 Distinction

D1 Apply the principles of circuit theory to complex circuits, with constant sources, explaining and evaluating the operation of that circuit.

Task 2

Use Thévenin’s theorem to find the current flowing through Rs in Fig.3
shown below. Use mutisim to check your answers for Rth, VT and current in Rs and include them to your work as evidence.

Task 3

a) Analyse the circuit shown in Fig 4 by using Kirchhoff’s laws and solving simultaneous equations to obtain voltage across and current through each component. Use multisim to confirm your answers and include it to your work as evidence.
Table 2 contains your unique numbers that you need to use for resistor values

b) Analyse the circuit in Fig 5, by using Superposition Theorem and obtain
the current through and the voltage across each component. Use multisim to confirm your answers and attach it to your work as evidence.

Hint: It is advisable to find the current through R, first. Table 3 contains your unique numbers that you need to use for resistor values in part b

Task 4.

(a) State the maximum power transfer theorem
(b) For the circuit shown in Fig.6, find the Thevenin equivalent circuit to the left of terminals a-b. State the value of R, for maximum power transfer to RL
(c) Derive the formula for the power delivered to R
(d) Using suitable software and suitable values for R, plot the power against RL and clearly indicate on your graph the value of RL for maximum power.
(e) Use your graph to show the dissipated power at R1 =20 and 60.

Table 4 contains your unique numbers that you need to use for resistor values for Task 4

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