A bulb has a power of 60 watts and a voltage of 12 volts. What is the current flowing through the bulb? A. 5 A B. 6 A C. 7 A D. 8 A 相关知识点: 试题来源: 解析 A。由 P = UI,可得 I = P / U = 60 / 12 = 5 A。
The main difference between watts, kilowatts and kilowatt-hours is that the latter (kWh) measure the amount of energy consumed over a set period. Although 1 kW equals to 1000 W, understanding how much energy is expended by every appliance in your home can have significant consequences on your...
multiply the wattage by the number of hours you use it each day to get the daily consumption in watt-hours . for example, if a light bulb uses 40 watts and is on for 5 hours a day, it consumes 200 watt-hours daily. some appliances, like air conditioners or pumps, have a starting ...
By using less energy,you can cut down on pollution.An energy-saving light bulb(灯) uses less energy to produce the same amount of light as a regular(普通的)bulb. Name:Regular light bulbPrice of one bulb:1.5Cost of energy:9.30(used in one year)Energy used:75watts...
The periodic time (equals the frequency) must be known in order to calculate the power of an electrical system. “Power analysis” is simply the method by which power is tested and studied, typically using a power analyzer. What is a power analyzer? A power analyzer is an instrument that ...
Understanding the difference between starting and running watts is crucial when determining which generator will meet your energy consumption needs. To help you estimate your wattage requirements, here are various household appliances’ average starting and running watts. Remember, these numbers will differ...
The Crest Audio CD3000 is a Class-D amplifier capable of delivering 1500 watts per channel into a 2Ohm load. Amazingly for such a brute, the CD3000 only takes up 2U of rack space, and weighs a mere (for a power amp) 21kg.Here's a good question: just why are power amplifiers so...
Starting and Running Watts of Typical Household Appliances Here are several other things to consider when sizing a generator: Number of People in Your Household How many people living in your home will directly impact the system size you need. If you live alone, you can probably get away with...