1) 1. Describe an electromagnet.  a) magnet that comes from nature b) magnet that only functions in the presence of electricity c) magnet that is always strong d) magnet that is present in rocks 2) What is required to create a basic electromagnet?  a) A wooden stick b) A pipe made of plastic c) Rubber band d) An iron Nail 3) 3. How may an electromagnet be strengthened? a) Use fewer wire coils b) increase the number of coils c) use wooden core d) lower the current 4) What happens to the electromagnet when the electric current is switched off? a) It becomes stronger b) It stays the same c) It loses its magnetism d) It becomes hot 5) Which part of an electromagnet carries the electric current? a) iron nail b) the coil of copper wire c) battery casing d) plastic insulation 6) In an electromagnet, why does the iron nail turn magnetic? a) The nail is heated by the wire  b) The magnetic domains are aligned by the electric current. c) The battery pulls the nail d) The nail produces electricity 7) Which of the following describes an electromagnet's practical application? a) Fridge magnets b) Magnetic stickers c) Toy cars d) Electromagnetic cranes in scrapyards 8) What will happen if you increase the voltage of the battery in an electromagnet circuit? a) the wire will stop worrying b) Nothing changes c) The electromagnet becomes stronger d) The electromagnet becomes weaker

ELECTROMAGNET

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