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 (33) the magnet, the more intense is the field. Objects that are attracted to the magnet feel a force (34) as ―magnetism ‖ when they are inside the magnetic field. This magnetic force can pass (35) some materials. Even a weak magnet will attract a pin to the other side of a (36) of paper, for example.
Magnets come in (37) shapes. A familiar one is the curved horseshoes magnet.
There are also bar magnets in the form (38) disc or a stubby cylinder. Every
magnet has (39) 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 (40) by passing an electric current through wire coiled
around a piece of iron. The (41) is called and electromagnet. Magnets are (42)
in many household and everyday devices. They are also commonly used in
industrial machinery, usually in the form of electromagnets.
Question 33: A. smaller B. stronger C. weaker D. thinner
Question 34: A. mentioned B. called C. known D. said
Question 35: A. through B. away C. outside D. next
Question 36: A. pane B. block C. pile D. sheet
Question 37: A. separate B. different C. unknown D. identical
Question 38: A. of B. in C. out D. up
Question 39: A. many B. several C. two D. one
Question 40: A. found B. had C. done D. made
Question 41: A. ending B. result C. conclusion D. final
Question 42: A.used B. made C. lived D. unseen