Complete the passage with the words provided:
Magnets
A solid object that has the power to attract iron and some metals is called a magnet. It does this through its magnetic field, a region of force surrounding it. The (1) _____ the magnet, the more intense is the field. Objects that are attracted to the magnet feel a force (2) _____ as “magnetism” when they are inside the magnetic field. This magnetic force can pass (3) _____ some materials. Even a weak magnet will attract a pin to the other side of a (4) ______ of paper, for example. Magnets come in (5) ______ shapes. A familiar one is the curved horseshoes magnet. There are also bar magnets in the form (6) _____ disc or a stubby cylinder. Every magnet has (7) ______ poles, called north and south, at opposite ends of it: at the two ends of a horseshoes magnet, for example, or on the two sides of a disc. Powerful magnets can be (8) _______ by passing an electric current through wire coiled around a piece of iron. The (9) _____ is called and electromagnet. Magnets are (10) ______ in many household and everyday devices. They are also commonly used in industrial machinery, usually in the form of electromagnets
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Lời giải:
Báo saiGiải thích: Cấu trúc so sánh hơn “the more…., the more…” (càng….càng…). Ở đây, ta có thể hiểu là “Nam châm càng chắc/bền, thì từ trường càng mạnh
Tạm dịch: Nam châm càng chắc/bền, thì từ trường càng mạnh