EGR203 Electric/Electronic Circuits Assignment 2(b)

1. Determine the Thévenin voltage and resistance of the circuit below. Use the Thévenin equivalent circuit to determine the voltage across and current flowing through the load resistor.

   

   R1 (ohms)	R2 (ohms)	R3 (ohms)	RL (ohms)	Vs (volts)
   200	800	140	600	12

2. Find the load resistance for maximum power transfer in the circuit above.

3. Replace the load resistance in the circuit above with a 9 Volt battery. Find the current flowing through the battery. Is the battery being charged (power absorbed) or discharged (power generated)?

4. Find the Thévenin voltage and resistance for the circuit below. Assume R = 90.

   

5. The figure below shows a resistive load R_L = 5 Ω connected to a Thévenin circuit with V_th = 20 V. For what value of Thévenin resistance is the power maximized? Find the maximum power delivered to the load. (Hint: Be careful, this is a trick question if you don't stop to think about it.)

   

6. Find the voltage v_c in the circuit below

   

7. (Rizzoni 3.41) Determine, using superposition, the voltage across R in the circuit below.

   IB	VG	RB	RG	R
   12 A	12 V	1 Ω	0.3 Ω	0.23 Ω

   

8. Determine the Thévenin voltage and resistance of the circuit below, given that R₁ = 2 Ω, R₂ = R_L = 4 Ω, V_s = 4 V, and I_s = 0.5 A. Use the Thévenin equivalent circuit to determine the power deliered to the load resistor.

   

9. Determine the Thévenin voltage and resistance of the circuit below. Use the Thévenin equivalent circuit to determine the voltage across and current flowing through the load resistor.

   IS	VS	R1	R2	R3	RL
   2 A	3 V	2 Ω	2 Ω	4 Ω	3 Ω

   

10. (Rizzoni 3.55) Find the Thevenin equivalent resistance seen by the load resistor R_L in the circuit below.

    VS	IS	R1	R2	R3	R4
    10 V	10 mA	1 kΩ	1 kΩ	1 Ω	3 Ω

    

Maintained by John Loomis, last updated 17 September 2014