Given that the CFL bulb is rated at 10% efficiency, if the LED bulb consumes half...
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Given that the CFL bulb is rated at 10% efficiency, if the LED bulb consumes half the amount of electrical power, for the same amount of usable light power output, what is the efficiency of the LED bulb? Similarly, if the INC bulb consumes 10x the amount of electrical power as the CFL bulb, for the same amount of usable light power output, what is the efficiency of the INC bulb?
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Given that the CFL bulb is rated at 10% efficiency, if
the LED bulb consumes half...
A 60W incandescent light bulb costs $0.25 and lasts 1 year. A compact fluorescent light (CFL)...
A 60W incandescent light bulb costs $0.25 and lasts 1 year. A compact fluorescent light (CFL) capable of producing the same amount of light costs $2, consumes 13W, and lasts 8 years. Assume electricity costs $0.10/kWh, the bulbs are operated for 5 hrs/day, and all money spent is taken out of a saving account earning 2% interest. (a) What is the net present cost associated with the incandescent bulb? The CFL? (b) The carbon emissions rate for Duke-Progress Energy is...
Please fully explain 6) A particular light bulb is rated at 75 Watts when a voltage...
Please fully explain
6) A particular light bulb is rated at 75 Watts when a voltage of 110 volts is placed across it. a) What is the electric current through the light bulb in this circumstance? b) What is the resistance of the light bulb? light bulb, should the resistance of the light bulb be lowered or raised from that in part b above if 0.682 A 1612 c) In designing a new wattage the power of the light bulb...
Problem 11.4 An individual white LED (light-emitting diode) has an efficiency of 20% and uses 1.0...
Problem 11.4 An individual white LED (light-emitting diode) has an efficiency of 20% and uses 1.0 W of electric power. Part A How many LEDs must be combined into one light source to give a total of 3.8W of visible-light output (comparable to the light output of a 100Wincandescent bulb)? Express your answer as an integer. N = SubmitMy AnswersGive Up Part B What total power is necessary to run this LED light source? Express your answer to one significant...
4. a) A building owner is thinking about replacing old-style incandescent light bulbs with more energy-efficient...
4. a) A building owner is thinking about replacing old-style incandescent light bulbs with more energy-efficient light-emitting diode (LED) lighting. Estimate the payback period (in years) for replacing a 100 W incandescent light bulb with an LED light that provides the same light output, but consumes only 18 W. Given data .price of electricity- $0.13/kWh assume the light is turned on for 5 hours per day, every day price of incandescent bulb = $1.20 .price of LED S19.10 annual interest...
4. a) A building owner is thinking about replacing old-style incandescent light bulbs with more energy-efficient...
4. a) A building owner is thinking about replacing old-style incandescent light bulbs with more energy-efficient light-emitting diode (LED) lighting. Estimate the payback period (in years) for replacing a 100 W incandescent light bulb with an LED light that provides the same light output, but consumes only 18 W. Given data .price of electricity- $0.13/kWh assume the light is turned on for 5 hours per day, every day price of incandescent bulb = $1.20 .price of LED S19.10 annual interest...
lamp 120 12° 0.7 m 5.0 m ground 1.A bicycle light bulb runs off a 6.0 volt battery, and draws a current of 0.50 ampere....
lamp 120 12° 0.7 m 5.0 m ground 1.A bicycle light bulb runs off a 6.0 volt battery, and draws a current of 0.50 ampere. 80% of the electrical power input is converted into radiant output, with a luminous efficacy of 16 lumen/watt. A reflector directs all the light from the bulb into a uniform cone of light, of half-angle 12°. The lamp is mounted on a bicycle at a height of 0.70 m above the ground, and the centre...
Imagine that you turn on the lamp in your room that contains an incandescent light bulb and that you stand 1m from the light. Suppose further that your bulb is rated at 100 W. What is the intensity o...
Imagine that you turn on the lamp in your room that contains an incandescent light bulb and that you stand 1m from the light. Suppose further that your bulb is rated at 100 W. What is the intensity of the light that passes out through this sphere at this distance of say 1m? Now compare this to a milliwatt laser at the same distance away. How many times more/less intense is the laser beam to your eye compared to the...
It is necessary to control a light bulb rated at 100 W, powered from a 208-Vrms,...
It is necessary to control a light bulb rated at 100 W, powered from a 208-Vrms, 50-Hz line, with the S4006LS2 in a 84-°C environment. Assuming that the light bulb is a fixed resistor,... a. Calculate its resistance in ohms with one place after the decimal. Submit Answer Tries 0/3 b. Calculate the maximum voltage across the SCR during the half cycle that the SCR is off. Answer in V with one place after the decimal. Submit Answer Tries 0/3...
Two lightbulbs operate on the same current. Bulb A has four times the power output of...
Two lightbulbs operate on the same current. Bulb A has four times the power output of bulb B. Why is the potential difference across Bulb A higher than across bulb B? What is the ratio of the potential difference across bulb A to that across bulb B? The current in a 120 V reading lamp is 1.6 A . If the cost of electrical energy is $0.075 per kilowatt-hour, how much does it cost to operate the light for an...
A wind-turbine has a propeller radius of 30 m, rated speed of 10 m/s and 30% efficiency at the rated speed.
A wind-turbine has a propeller radius of 30 m, rated speed of 10 m/s and 30% efficiency at the rated speed. a) Calculate the rated power for this wind turbine. (air density is 1.2 kg/m). b) If this turbine produces 2 GW-h energy in one year, what is its capacity factor?
Please fully explain
6) A particular light bulb is rated at 75 Watts when a voltage of 110 volts is placed across it. a) What is the electric current through the light bulb in this circumstance? b) What is the resistance of the light bulb? light bulb, should the resistance of the light bulb be lowered or raised from that in part b above if 0.682 A 1612 c) In designing a new wattage the power of the light bulb...
4. a) A building owner is thinking about replacing old-style incandescent light bulbs with more energy-efficient light-emitting diode (LED) lighting. Estimate the payback period (in years) for replacing a 100 W incandescent light bulb with an LED light that provides the same light output, but consumes only 18 W. Given data .price of electricity- $0.13/kWh assume the light is turned on for 5 hours per day, every day price of incandescent bulb = $1.20 .price of LED S19.10 annual interest...
4. a) A building owner is thinking about replacing old-style incandescent light bulbs with more energy-efficient light-emitting diode (LED) lighting. Estimate the payback period (in years) for replacing a 100 W incandescent light bulb with an LED light that provides the same light output, but consumes only 18 W. Given data .price of electricity- $0.13/kWh assume the light is turned on for 5 hours per day, every day price of incandescent bulb = $1.20 .price of LED S19.10 annual interest...
lamp 120 12° 0.7 m 5.0 m ground 1.A bicycle light bulb runs off a 6.0 volt battery, and draws a current of 0.50 ampere. 80% of the electrical power input is converted into radiant output, with a luminous efficacy of 16 lumen/watt. A reflector directs all the light from the bulb into a uniform cone of light, of half-angle 12°. The lamp is mounted on a bicycle at a height of 0.70 m above the ground, and the centre...
It is necessary to control a light bulb rated at 100 W, powered from a 208-Vrms, 50-Hz line, with the S4006LS2 in a 84-°C environment. Assuming that the light bulb is a fixed resistor,... a. Calculate its resistance in ohms with one place after the decimal. Submit Answer Tries 0/3 b. Calculate the maximum voltage across the SCR during the half cycle that the SCR is off. Answer in V with one place after the decimal. Submit Answer Tries 0/3...
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