# Varities of English

May 15th, 2015
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Varieties of English, such as Singlish, have an important role to play in contemporary society. Discuss. Different varieties of English, such as the interesting variety used in Singapore, known as ‘Singlish’, have an important role to play in our modern society.

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Assignment 2 SolutionsAssignment 2.4 Thevenin / Norton Equivalents and Transients in First Order RC- and RL-CircuitsP1. Transient in 1st order RL-circuit (30 marks)Find inductor current and voltage and resistor currents for the circuit in Fig.1. The switch is closed at t=0. Make PSIM simulations and present the relevant graphs.Fig.1. 1st order RC-circuitSolution.Because the switch is open prior to commutation, inductor current initial condition is zero . Thevenin voltage from Fig.2. (1)Fig.2. Resistive circuit for Thevenin equivalent voltageThevenin equivalent resistance from Fig.3Fig.3. Circuit for Thevenin equivalent resistance(2)(2 resistances of 2 Ohm in parallel, there is no current in diagonal resistance R3). Then steady state inductor current(3)and time constant. (4)Inductor current for zero initial condition becomes. (5)Inductor voltage. (6)To fi

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