The maximum current allowed by a device’s power rating is limited by a 25-mA fuse. When the device is connected to a 9-V source, what is the maximum power the device can dissipate? 1–20 Traffic lights are being converted from incandescent bulbs to LED arrays to save operating and maintenance costs. Typically, each incandescent light uses three 100-W bulbs, one for each color R, Y, G. A competing LED array consists of 61 LEDs with each LED requiring 9 V and drawing 20 mA of current. There are three arrays per light—R, Y, G. A small city has 1560 traffic signals. Since one light is always on 24/7, how much can a city save in 1 year if the city buys their electricity at 7:2¢ per kWh?
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