For the circuit shown below: a) Calculate vo and i。. b) Calculate the power dissipated in the 15 N resistor. c) Calculate the power delivered by the power source. 202 ли 15 Ω ли 120 V(+ ww 20 50 4 Ω 50 Vo
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- 1. An electro-magnet draws 3 kW of active power and 4 kvar of reactive power. a. Calculate the apparent power. b. Calculate the power factor. 2. A capacitor drawing 4 kvar is placed in parallel with the electro-magnet of Question 1. a. Calculate the new value of apparent power b. What is the new value of reactive power? c. What is the value of active power? d. What is the new power factor?III. Problem Solving. Compute up to FOUR decimal places. BOX your final answers (with units). 1. What is the equation of the waveform in figure 1? 2. A coil takes 15A from a 250V source. When a 20 Ohm resistor is connected across the coil. The combination draws a total current of 25A. Determine the resistance and inductive reactance of the coil. 3. In the single-phase power system in figure 2, determine the voltage, Vab, and current, I b, being received by the load, 10 +j15 N. V, volts 10 ms AV 100 V Figure 1 250 V 0, deg t, msec CS Scanned with CamScanner j8n 120280°V 12 j3N 252 M €150 121 j45 1 1.250 /150 2.5.2 b Figure 2 j6n j12AQUESTION 7 An industrial heater has a nameplate that reads: 166 Vrms 50 Hz 106 KVA 0.88 lagging What is the apparent power? Write your answer in kVA. QUESTION 8 An industrial heater has a nameplate that reads: 128 Vrms 69 Hz 155 KVA 0.75 lagging What is the real power? Write your answer in Watts. QUESTION 9 An industrial heater has a nameplate that reads: 219 Vrms 50 Hz 106 kVA 0.82 lagging What is the reactive power? Write your answer in VAR.
- Three coils each having resistance of 29 Ω are connected in delta across 401 V, 50 Hz supply. Then the total power consumed is 694.57 W 3201.42 W 5544.86 W 191.21 WA 2.62 ko resistor is connected to an AC voltage source with an rms voltage of 230 V. (a) What is the maximum potential difference across the resistor (in V)? V (b) What is the maximum current through the resistor (in A)? A462 l 27% 23:01 A A. :D ļ chegg.com/homeworl © P QUESTION 4 If the maximum energy stored in the coil is 3mJ, what is the value of the resitance in the figure? 48 0 270 210 85 02 8= 36.0 V ww 100.0 Ω L = 75.0 mH R www eeee Go to website Show transcribed data : ! >
- Ep Es 本 The reading of the AC voltmeter is 40 V rms. Find the following: Figure 1 a. The value of the peak load voltage. EL(peak) = R, 1ΚΩWaveform Generator RED CLIP BLACK CLIP R1 C1 1kQ 100μF Figure 3: Breadboard circuit. GND 7. Measure the value of R1: 8. Measure the value of C1: Wave Gen Wave Gen GND GND + GND GND For High Level O For Low I Level τ: R1: R1 1kQ C1: R1 1kΩ 카 GND Figure 4: Circuit behaviour. The circuits in Figure 4 show the expected behaviour of the RC circuit. When the waveform voltage level is high, the capacitor charges through R1. When the waveform voltage is low, the capacitor discharges through resistor R1. It is important to note that the switches in Figure 4 do not exist inside the instrument. They are an analogy to the circuit behaviour. 6. Calculate the T for this circuit: 11 GND C1 100μF C1 100μFFind X Xc Z, I, VR. VL Vcand don't forget to put their units. Source voltage 380450° 4500 470NF 5mH
- An electro-magnet draws 3 kW of active power and 4 kvar of reactive power. a.) calculate the apparent power b.) calculate the power factorQUESTION 3 A 450nF capacitor, a 820 ohm resistor, and a function generator are all connected in parallel. The supply voltage is 60V RMS 1kHz. Calculate the power factor of the circuit. O 58% leading O 71% leading O 85% lagging O 40% leadingAC xuf lac V ac 21. The simple AC powered circuit above is being measured for AC current and voltage across a 1uF capacitor. The measured current is 200mA and the measured voltage is 40V. (note: 2 separate questions follow) a. Calculate the capacitive reactance, Xc. b. Calculate the voltage frequency.
