Đơn Vị Của độ Tự Cảm L Là | Cungthi.online

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• Đơn vị của độ tự cảm L là  

Câu 1:

Đơn vị của độ tự cảm L là  

A.

Wb (Vê be).        

B.

H (Hen ri).        

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Phân tích: + Đơn vị của độ tự cảm L là henri.  

Vậy đáp án đúng là B.

 

 

C.

T (Tes la).

D.

V (Volt).

Những câu hỏi này đến từ bài kiểm tra này. Bạn có muốn thực hiện bài kiểm tra thử không?

Bài tập trắc nghiệm 15 phút Lực từ - cảm ứng từ - Từ trường - Vật Lý 11 - Đề số 1

• 15 phút
• 10 câu hỏi

Làm bài kiểm tra

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• Một đoạn dây dẫn mang dòng điện 2 A đặt trong một từ trường đều thì chịu một lực điện 8 N. Nếu dòng điện qua dây dẫn là 0,5 A thì nó chịu một lực từ có độ lớn là

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• Hình nào biểu diễn đúng hướng lực từ tác dụng lên một đoạn dây dẫn thẳng mang dòng điện I có chiều như hình vẽ đặt trong từ trường đều, đường sức từ có hướng như hình vẽ:
• Treo đoạn dây dẫn có chiều dài ℓ = 5 cm, khối lượng m = 5g bằng hai dây mảnh, nhẹ sao cho dây dẫn nằm ngang. Biết cảm ứng từ của từ trường hướng thẳng đứng xuống dưới, có độ lớn = 0,5 T và dòng điện đi qua dây dẫn là I = 2A. Nếu lấy g = 10 m/s2 thì góc lệch của dây treo so với phương thẳng đứng là

• Đơn vị của độ tự cảm L là  

• Trong các trường hợp sau đây, trường hợp nào là tương tác từ
• Cảm ứng từ tại một điểm trong từ trường
• Phát biểu nào sau đây là không đúng?

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  High birth rates contribute to overpopulation in many developing countries. Children are assets to many poor families because the provide labour, usually for farming. Cultural norms in traditionally rural societies commonly sanction the value of large families. Also, the governments of developing countries often provide little or no support, financial or political, for family planning; even people who wish to keep their families small have difficulty doing so. For all these reasons, developing countries lend to have high rates of population growth.

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  Overpopulation, the situation of having large numbers of people with too few resources and too little space, is closely associated with poverty. It can result from high population density, or from low amounts of resources, or from both. Excessively high population densities put stress on available resources. Only a certain number of people can be supported on a given area of land, and that number depends on how much food and other resources the land can provide. In countries where people live primarily by means of simple farming, gardening, herding, hunting, and gathering, even large areas of land can support only small numbers of people because these labour intensive subsistence activities produce only small amounts of food.

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