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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.

Can you help me set up my breadboard so I can ... Measure the values of base current, _________, collector current, _________ ?

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

100 150 + VA- a + -7V, 81. 52 Figure 2 shows a simplified model of a gas-discharge lamp. One characteristic of these lamps is that they exhibit negative resistance; in other words, as current increases the voltage drops further, making such lamps inherently unstable. As such, a current-limiting ballast is required. For the connection shown in the figure: 1. Find the equivalent Thevenin circuit of the lamp. 2. Find the ballast resistance needed to limit the current drawn from a 24-volt source to 6 amperes.

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2:34 ull 4G I moodle1.du.edu.om An RTD forms one arm of a Wheatstone bridge as shown in the figure. The RTD is used to measure a temperature with the bridge is operated in a balanced mode. The RTD has a resistance of 252 at a temperature of 0°C and a thermal coefficient of resistance a=0.003925C-1. The value of the variable resistance R, must be set to 41.485 Q to balance the bridge circuit. Determine the temperature measured by the RTD where R2=R3=1002 R2 R3 RTD RRTD E, Select one: O a. 4200

Part A shown in image, part B) for the circuit find the load resistance (RL) that draws the maximum amount of power from the rest of the circuit and calculate the maximum power that can be delivered to RL  c) calculate the range of resistance values for rl that will result in more than 10 watts of power absorbed in rl

I need an answer in short time

Please help with a, d, f, h. I don't know why my values are coming out incorrect even though the units are correct.

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)

Question 3: A reference current of 0.3mA is given. Make a current mirror circuit which provide currents of 0.2mA and 0.3mA.

Sy A circuit design calls a 1.5 kN resistor to have 4.7 V across its terminals. What would be the expected current? The circuit is built, and the resistance is measured at 1500 2 and the voltage at 4.7 V. What is the current through the resistor? f is ie