What is the energy collected fromthe sun in watts /area as measuredin the pyranometer.O a. solar batteryO b. irradianceO c. solar invertero d. voltage

What is the energy collected from the sun in watts /area as measured in the pyranometer? The…

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Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)

5th Edition

ISBN:9781305084766

Author:Saeed Moaveni

Publisher:Saeed Moaveni

Chapter12: Electric Current And Related Variables In Engineering

Section: Chapter Questions

Problem 23P

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In a parallel electrical circuit, the total current is the sum of the individualcurrents. An air conditioner has a blower and a compressor that are wired ina parallel circuit. The blower draws 1.042 amperes and the compressor draws11.95 amperes of current. When both are operating, what is the total currentdrawn?
4. An incandescent lamp has a tungsten filament whose resistance is 96 ohm at its operating temperature of 2900°C. Calculate the filament resistance when the lamp is disconnected from the electric source under which conditions the temperature is 24°C.
Determine the luminous efficacy of the following lamps having comparable illumination outputs:a. A 300 W incandescent lamp that emits 5820 lmb. Two 32 W linear fluorescent lamps that emit 2950 lm per lamp in a luminaire that consumes 70 W including the ballastsc. A 70 W metal halide lamp that consumes 88 W, including the ballast and emits 5500 lm
Calculate the change in 5 m long copper wire when its temperature changesby 60º C.
1. An unknown lamp placed 6m from a photometer screen provides the same illuminance as a 90 cd lamp placed 4 m from the screen. What is the candlepower of the unknown lamp? 2. The illuminance of a room 20 ft x 15 ft is being designed. The illuminance required is 50 footcandles. What is the total required lumens output of the lamp assuming room and luminaire efficiency of 42%?
e Q2/ Calculate the angle made by beam radiation with normal to a fiat plate collector on December 5, at 9.15 AM. solar time for a location at 28° 35' N. The collector is tilted at an angle of latitude plus 6°, with the horizontal and is pointing due south. Cal NOT :-May be using equations: Z 20 L h L 1- cos OT = cos (-ß) cos 6 cos + sin (4- ß) sin 8- B_ 528
A tungsten lamp filament has a temperature of 20.5 degrees Celsius and a resistance of 500 ohms when taking normal working current. Calculate the resistance of the filament when it has a temperature of 25 degrees Celsius. RTC at 0 degree Celsius is 0.005/°C. * Your answer
4. Assume that half of the light emitted by a 100 W incandescent lamp (1750 lumens) illuminates a 100 ft2 surface. a. Determine the average illuminance of the surface in foot-candles. b. Determine the average illuminance of the surface in lux. c. What would the average illuminance be if only half of the light illuminated the surface?
i) What is a photovoltaic cell? ii) A certain solar cell type has an output capability of 0.5 A at 0.4Volts. A series / parallel solar array has been designed of such cells with 80 parallel strings and each string has 1500 cells in series. Calculate: (i) Voltage capability (ii) Current capability and (iii) Power output capability of the array.
Which of the following best describes a Venturi Meter? an opening having a closed perimeter in a wall or partition used for measuring flow of fluids are flow measurement instruments which use a converging section of pipe it can be used to measure fluid flow velocity by converting Kinetic Energy to Potential an opening in a dam or other Ohydraulic structure to control the passage of water Trapezoidal weir with side slope of 1 horizontal to 4 vertical Suttro Weir V-Notch Weir Cipoletti Weir Contracted Weir
2. A parallel-plate capacitor initially has a capacitance of 100 F. What will be the capacitance if the distance between the plates is doubled?
Give 6 applications of battery to civil engineering field and explain.

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What is the energy collected from the sun in watts /area as measured in the pyranometer. O a. solar battery O b. irradiance O c. solar inverter O d. voltage