ANALYSIS+DESIGN OF LINEAR CIRCUITS(LL)
8th Edition
ISBN: 9781119235385
Author: Thomas
Publisher: WILEY
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Chapter 1, Problem 1.20P
Traffic lights are being converted from incandescent bulbs to LED arrays to save operating and maintenance costs. Typically, each incandescent light uses three 100-W bulbs, one for each color R, Y, G. A competing LED array consists of 61 LEDs with each LED requiring 9 V and drawing 20mA of current. There are three arrays per light—R, Y, G. A small city has 1560 traffic signals. Since one light is always on 2417 , how much can a city save in 1 year if the city buys their electricity at
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Lighting consumes 4% of the energy consumed by a building. Control strategies that turn lights on when the space is occupied are one energy savings strategy. In this problem, we'll calculate the energy impact of a lighting schedule. For the purposes of this problem, a neopixel is a single LED. A neopixel strip is a group of LEDs.
A) Measure the current draw of your neopixel strip of 5 LEDs when all 5 lights are powered on, set to full brightness, with each RGB color set to 255. Report your answer in units of amps.
B) Calculate the power consumption of your 5 neopixel strip when connected to a 5V source using the current measured in part A. Report your answer in units Watts.
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i. Option 1: Lighting is on continuously for 7 days
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Lighting consumes 4% of the energy consumed by a building. Control strategies that turn lights on when the space is occupied are one energy savings strategy. In this problem, we’ll calculate the energy impact of a lighting schedule. For the purposes of this problem, a neopixel is a single LED. A neopixel strip is a group of LEDs.
A) Measure the current draw of your neopixel strip of 5 LEDs when all 5 lights are powered on, set to full brightness, with each RGB color set to 255. Report your answer in units of amps.
B) Calculate the power consumption of your 5 neopixel strip when connected to a 5V source using the current measured in part A. Report your answer in units Watts.
The student engineer of a campus radio station wishes to verify the effectiveness of the lightning rod on the antenna mast (see the figure below). The unknown resistance Ry is between points C and E. Point E is a "true ground," but is inaccessible for direct measurement because the stratum in which it is located is several meters below Earth's surface. Two identical rods are driven into the ground at A and B, introducing an unknown resistance Ry. The procedure for finding the unknown resistance Rx is as follows. Measure resistance Ry between points A and B. Then connect A and B with a heavy conducting wire and measure resistance
R, between points A and C.
Chapter 1 Solutions
ANALYSIS+DESIGN OF LINEAR CIRCUITS(LL)
Ch. 1 - Given an electrical quantity described in terms of...Ch. 1 - Express the following quantities to the nearest...Ch. 1 - An ampere-hour (Ah) meter measures the time...Ch. 1 - Electric power companies measure energy...Ch. 1 - Fill in the blanks in the following statements. To...Ch. 1 - Which of the two entries is larger? 1000...Ch. 1 - A wire carries a constant current of 30A. How many...Ch. 1 - The net positive charge flowing through a device...Ch. 1 - Figure P1-9 shows a plot of the net positive...Ch. 1 - The net negative charge flowing through a device...
Ch. 1 - A cell phone charger outputs 9.6 V and is...Ch. 1 - For 0t5s, the current through a device is...Ch. 1 - The charge flowing through a device is...Ch. 1 - The 12-V automobile battery in Figure P1-14 has an...Ch. 1 - The current through a device is zero for t0 and is...Ch. 1 - A string of holiday lights is protected by a 12A...Ch. 1 - When illuminated the relationship for a photocell...Ch. 1 - A new 6-V alkaline lantern battery delivers...Ch. 1 - The maximum current allowed by a device's power...Ch. 1 - Traffic lights are being converted from...Ch. 1 - Two electrical devices are connected as shown in...Ch. 1 - Figure P1-22 shows an electric circuit with a...Ch. 1 - Figure P1-22 shows an electric circuit with a...Ch. 1 - In Figure P1-24 the voltage v2 is 10 V and v4 is 5...Ch. 1 - For t0, the voltage across and power absorbed by a...Ch. 1 - Repeat Problem 1-22 using MATLAB to perform the...Ch. 1 - Using the passive sign convention, the voltage...Ch. 1 - Power Ratio (PR) in dB A stereo amplifier takes...Ch. 1 - AC to DC Converter A manufacturer's data sheet for...Ch. 1 - Charge-Storage Device A capacitor is a...Ch. 1 - Compute Data Sheet A manufacturer's data sheet for...Ch. 1 - Light Source Comparison A Today people have three...
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