solution-10 - Version 001 Homework 10 philipose(2220 This print-out should have 16 questions Multiple-choice questions may continue on the next

# solution-10 - Version 001 Homework 10 philipose(2220...

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Version 001 – Homework 10 – philipose – (2220) 1 This print-out should have 16 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. HewittCP923P05 001 10.0points How much does it cost to operate a 100 Wlamp continuously for one week if the powerutility rate is 0.15 dollars/kWh? The electricity energy supplied by a powerutility company for one week to the lamp isWork =P×T= (100 W) (168 h)parenleftbiggkW1000 Wparenrightbigg What is the current through the bulb? The current is I = P V = 72 . 6 W 119 V = 0 . 610084 A . 003(part2of3)10.0points What is the resistance of the bulb? 004(part3of3)10.0pointsA lamp dimmer puts a resistance in serieswith the bulb.What resistance would be needed to reducethe current to 0.45 A?