HW3_Solution(2) (2)

Sample Problem continued with solution process Step 1: Drawing a circuit diagram and labeling the unknowns. All told there are 5 elements, 4 resistors and 1 voltage source. For resistors I intentionally label the currents going from + to -. That way, I can write V = I R. If I labeled the current through a resistor from – to + as I, then I have to write the equation by Ohm's law as V = -I R. For convenience I label the current i, through the voltage source from – to +. (There is no Ohm's law for a source to follow. Do not try to have a resistance in a source. What is a V, 3 + (1 |1A 10 Ω + V, iş V2 20 i2 V3 + 2 20Ω 4 İz I then examine the circuit. I see that this is a obvious consequence of the labeling: iz = i,= i, All are current going through one path with the same direction as I labeled. If I had labeled one in the opposite direction, I just had to put in a minus sign. source? A voltage source is to guarantee the voltage drop from its + to its – a fixed voltage V,. I denote four…

Now let's try using a pack of AA batteries (1.2 V output voltage and 0.2 Ohm internal resistance each) to replace the lead-acid battery. In order to match the car lead-acid battery, first, 10 such AA batteries need to be connected in series to form a 12V cell, while 50 such cells need to be connected in parallel (as shown in picture above; the total of 500 AA batteries are used). Find the power that is supplied to the same "car starter" using this pack of AA batteries. (Hint: for the second question, you need to find the total voltage and the internal resistance of the whole pack; you also need to find the resistance of the "car starter"; this can be done using the data of the first part of this problem)

B.. What is the load current for the circuit shown in the figure? Please choose one: a. 6.0 mA b. 3.0 mA C. 9.0 mA D. 7.5 mA

Please in typing format please ASAP for the like   Please answer the same to

Simplify the complex circuit below to and find the following if 20-V of voltage is supplied. A) Total / Equivalent ResistanceB) Total CurrentC) Current, Voltage Drop, and Power on each resistor

Help me answer, I want to check my solution To get the contribution of the 75V source to iR, we first kill the 50mA source. What is the resulting equivalent resistance in series with the 75K resistor (in Kohms)  To get the contribution of the 75V source to iR, we first kill the 50mA source. What is the resulting value of iR (in mA)? What is the nodal equation for Vx? What is the Thevanin voltage in (Volts) and Thevanin resistance in (Kohms)?

The elements in the circuit shown have the following values: R1 = 1937.97 Q. R2 = 8792.15 Q. Rz R3 = 1441.86 0. It V1 = 8.1 V. 11 = 0.0072 A R. Vo Determine the following: a.) The Thevenin Resistance is, Rth (in ohms): b.) The Thevenin Voltage is, Vth (in volts): c.) The I, output voltage Vo (in volts): Assume R3 to be the load.

A combination of three resistors R1, R2 and R3 in series is connected across a voltage source Vr. The voltage drop across R1 and R3 are 10 V and 36 V, respectively. If the current supplied by the source voltage is 1.4 A and the total power supplied by the source is 70 W, Calculate the following: A. The value of Vr and the voltage drop across R2 (Ans. VT B. The equivalent resistance across the voltage source, and the values of R1, R2 and R3 (Ans. Req 50 V, V2 = 4 V) 2.8571 N, R3 = 35.7143 N, R¡ = 7.1429 N, R2 = C. The power dissipated by each resistor (Ans. P1 = 14 W, P2 = 5.6 W, P3 = 50.4 W) = 25.7143 N)

1. a) The input to the circuit shown in Figure-la is the voltage, vs. The output is the voltage vo. The voltage v, is used to adjust the relationship between the input and output. Determine values of R4 and vb that cause the circuit input and output have the relationship specified by the graph shown in Figure-1. 30 k2 R4 Vo. V 5 k2 20 k2 V's, V (a) (b) Figure-1

Question 3 (a) Briefly explain what is the per-unit systero. (b) A resistance of 60n is selected as the base resistance in a circuit consists of three resistors. If R, =1002, R, =30002 and %3D R, = 200 calculate the per-unit vahue of each resistance. %3D (c) A power of, P-25KW and a voltage of, E-2400V are selected as the base power and base voltage of a power system respectively. Calculate the value of the base impedance, Z, and the base current, I,. (d) A resistor bas a per-nnit value of 5.3. Given the base power is P=250KW, and the base voltage is E,-12470V, calculate the ohmic value (actual value) of the resistor. (e) A 4000 resistor caries a cucrent of 60A. Given the base valne of voltage, E, 4KV, the base value of power, P, 500KTF, the base value of current, I, =125.4, and the base value of resistor, 2, = 320 calculate the following: i The per-unit resistance. ii. The per-unit current. ii. The per-unit voltage across the resistor. iv. The per-unit power.

Find the thevenins equivalent circuit diagram shown in figure with respect to load resistance

Electrical engineering