53. The circuit of Fig. 4.77 contains three sources. (a) As presently drawn, would nodal or mesh analysis result in fewer equations to determine the voltages vi and v2? Explain. (b) If the voltage source were replaced with current sources, and the current source replaced with a voltage source, would your answer to part (a) change? Explain? 10 A 12 N 240 V 30 Ω 60 V FIGURE 4.77

2. Explain which of the following instructions are invalid? State the invalidation reason and give the correct form for invalid instructions: a. MOV DL,AX b. MOV ES,CX c. MOV [BX],[2000] d. MOV BX,[AX] e. MOV CL,[BL+200] f. MOV 1234,DX g. MOV CH,[BX+SI+300] h. MOV DS,[SI+DI-5] i. MOV [4500],1234 j. MOV 200,[300]

What is the current thru R7? (Answer in Amps) Answer in Amps 1 R1 16 Ohms R8 28 Ohms R2, 1 Ohms ww R10, 240 Ohms www R7, 40 Ohms WW 17 4 6 4 6 R3, 3 Ohms V6, 256 Volts + 0 2 R4 60 Ohms

Consider the circuit shown below. Calculate The voltage across R4 resistor. 12 V R1= 20 22 M R4= 80 22 R2= 40 Ω R3= 60 Ω