user-avatar
toanthcs.db
2 năm trước
Mắc nguồn điện một chiều có điện trở trong r=1 ôm với mạch ngoài là điện trở R=4 ôm để thành mạch kín. Biết công suất của nguồn là 20W. Công suất tỏa nhiệt trên điện trở R là bao nhiêu?
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Read the passage, and then tick the correct answer: true (T), or false (F). Vehicles in the near future, will be fuel efficient, zero emission, and use high tech electronics and software to assist drivers in a variety of ways. Vehicles will communicate with each other, with the road and with traffic signals. Autos and trucks of the future will use vision enhancement devices to help you navigate through bad weather, let you see around them, or warn you of a possible collision with a pedestrian or animal. They will also let you know if you are getting drowsy or straying from your lane. In twenty years, Cars of the future will be different than the automobiles of today, and so will the driving experience. True False 1. Vehicles will always cause green house gases. 2. People can connect with others in different cars in the future. 3. People will be able to drive safe even in bad weather. 4. Cars will notice people when there is a passenger crossing the lane. 5. Cars and how to drive will only change after two more decades.

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team