Lab Notes 12

Task 3 A three phase, four wire star connected load consisting of: ZR: a resistor of 9500 in series with a 3H inductor ZB: a resistor of 1950 ZY: a resistor of 1950 in series with a 4µF capacitor Using the equipment available in the power lab (Room T017), connect the given load to a three-phase supply available in the lab and: 3.1. Determine the current of each line and the neutral current and measure the total power supplied by the source. 3.2. Analytically, calculate all currents and the total power and compare with those obtained in measurements. 3.3. Device a method and measure the waveform of the neutral current. Discuss the obtained waveform and the reason for any distortion in the waveform 3.4. Validate your calculations using computer simulation

-) A 20 ft by 24 ft office has a 14 ft ceiling height, with room surface reflectances of 80% ceiling, 50% walls, and 20% floor. Technical information for the luminaire that you selected to light this space is shown below, and from that you have determined that each luminaire has 4500 lumens. The luminaires are pendant mounted and hang 2 ft below the ceiling. How many luminaires are needed to produce an average of 30 footcandles on the desks (30" AFF) in the office? Show your work and keep track of units as you set up and solve the equations. Specifically, show the values of the RCR and CU as part of your work.

hand written asap plzzzzz..i'll upvote

Please show solution clearly

question 2

Having a hard time solving and graphing, can you help me please?

ELTE 108 Homework 6 Circuit Four: R2 = 236 Q R3 = 244 Q E2 = Ez = 12 = I3 = R = 30 Q E, = I = R = 160 2 E = ET = 240 V R7 = IT = 0610 assign ELTE108 Homework 06_2011-11-04ACC.docx Circuits: ver 2011-11-04 mjf Page 5 of 6

Answer The following problem. Base on the given Table. Show complete solutions. View Image *Here's the whole questions. Answer only number 4.

Ex. 94. See Figure 94. Challenging exercise? Given a 8.00 kOhm potentiometer, V_AC=100.0 volts, V_BC= 10.0 volts and load current is 3.000 mAmps. Determine R_AB Ohms, R_BC Ohms, and power (watts) dissipated by the potentiometer. ans:3

Answer The following problem. Base on the given Table. Show complete solutions. View Image

Answer The following problem. Base on the given Table. Show complete solutions. View Image

20. The resistance R and a 2 μF capacitor are connected in series         across 200-V dc supply. Across the capacitor is a neon lamp         that strikes at 120 volts. Calculate the value of R to make the           lamp strikes 5 seconds after the switch has been closed.        A. 4.89 kΩ            B. 4.89 MΩ        C. 2.73 MΩ          D. 2.94 MΩ

ANSWER ASAP PLS