You are to compare the electrical requirements of three light bulbs. Use the lighting effect of a 60...

Question

You are to compare the electrical requirements of three light bulbs. Use the lighting effect of a 60 w incandescent light bulb as the basis of comparison. For each of the three bulbs, incandescent, CFL, and LEDa) state the electrical power (watts) used and the luminous energy (lumens) output by each of the three bulbs,b) calculate the current used by each (assume an operating voltage of 120 V),c) calculate the effective resistance of each,d) determine the cost of using each bulb for 1 hour.($0.18/kWh)

Robert · Accepted Answer

Electricity 
(a)The power input of the bulbs are as follows- 
Incandescent bulb – 60 W 
CFL – 14 W 
LED – 8 W 
Their energy output is as follows – 
Incandescent bulb – 16 lumens/Watt 
CFL – 60 lumens/ Watt 
LED – 150 lumens/ Watt 
(b) Power consumed = Voltage * Current 
The current consumed for each of the bulbs are as 
follows – 
Incandescent bulb – 60 /120 = 0.5 A 
CFL – 14/ 120 = 0.1166 A 
LED – 8 / 120 = 0.0666 A 
© Resistance = Voltage / Current 
The resistances are calculated are as follows –  
Incandescent bulb - 60 / 0.5 = 120 
CFL – 60 / 0.1166 = 514.579 
LED – 60 / 0.666 = 900.9 
(d) The cost involved = Power consumed ( in Kilowatt)* 
time(hour) * cost (per kilowatt hour) 
The cost involved is as follows –  
Incandescent bulb = 0.18 *0.06 = 0.0108 dollars 
CFL = 0.18 * 0.014 = 0.00252 dollars 
LED = 0.18 * 0.08 = 0.00144 dollars

You are to compare the electrical requirements of three light bulbs. Use the lighting effect of a 60 w incandescent light bulb as the basis of comparison. For each of the three bulbs, incandescent,...

Solution

Answer To This Question Is Available To Download

Related Questions & Answers

Submit New Assignment