. Magnets will attract 6. Magnetic shielding A. iron B. steel C. magnetic materi

Question

. Magnets will attract 6. Magnetic shielding A. iron B. steel C. magnetic material D. All the answers are correct. A. provides another path for magnetic B. dissolves the magnetic lines of C. repels the lines of force, turning lines of force to follow 2. The law of magnetic repulsion and attrac- them back to the source of tion states thatpoles attract while poles repel. A. like, unlike B. unlike, like C. permanent, temporary D. temporary, permanent D. does not exist yet but will soon be discovered 7. The strength of an electromagnet depends A. the number of turns of conductor B. the amount of current in the C. the type of core material 3. The invisible lines of force surrounding the lines. A. flux B. residual C. reluctance D. current conductor D. All the answers are correct. 4. The resistance to magnetic force is referred 8. Gilberts are units f to as A. flux B. reluctance B. reluctance C. magnetomotive force D. None of the answers are correct. D. 9. Permeability is expressed using the symbol None of the answers are correct. 5. The small amount of magnetism left in a piece of soft iron after the magnetizing force has been removed is referred to as 10. Which combination below would produce B. C. D. resid reflective None of the answers are correct. the strongest electromagnet? A. 100 turns, 0.25 amps B. 10 turns, 1000 amps C. 1000 turns, 0.5 amps D. 10,000 turns, 10 microamps Copyright by Goodheset WBloon Co, Inc Permission grunded to reproduce for educational uae only

Explanation / Answer

1- all of the above.

As the steel , iron are both magnetic materials.

2-

Unlike poles attract each other while like poles repel.

3-

These invisible lines are called flux.

4-

Reluctance is the opposition to magnetic flux.

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