If a headlight burns out the other headlight remains lit typically even the

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If a headlight burns out, the other headlight remains lit; typically, even the high-beam bulbs continue to work if the low-beam for that headlamp is burnt out. If they were in series, one bulb burning out would break the circuit and they would all go dead; therefore they are wired in parallel. 8) Why are some materials good conductors and others not? Conduction is one of the basic property of the metal. But conduction in metals differ, this difference in the conductivity can be explained using Band Theory 9) A flashlight uses batteries that add up to 3.0 V and has a power output of 0.50 W. a) How much current is drawn from the batteries? Current = (0.5/3.0) = 0.16A . b) What is the effective resistance of the flashlight? Effective resistance = (3.0/0.16) = 18.75 ohms 10) How much does it cost to run a 1500 W hair dryer 30 minutes each day for one month (30 days) at a cost of 20 cents per kWh? 1500 watts * 0.5 hours = 0.75 kWh. 0.75 kwh*(\$0.20/1 kwh) = \$0.15
• Spring '17
• Roger Kwok
• Electric charge

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