electrical lamp resistance physics help?
2017-03-04 6:58 am
Suppose the cost of electricity is $0.122 per kW-h. With $1.00 of electricity, how long can you run a lamp that is plugged into a 120.0-V outlet if the lamp s resistance is 188 Ω?
回答 (1)
2017-03-04 7:01 am
✔ 最佳答案
1.00/0.122 kW-hThe power use is P = V^2/R in Watts.
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