1) This picture illustrates the construction of a) a magnet b) an electromagnet c) a series circuit d) a parallel circuit 2) How can the electromagnet be made stronger? a) adding more coils of wire to the nail b) adding more dry cells to the circuit c) using a smaller battery d) removing some of the coils from the nail 3) What kind of magnet can be turned on and off? a) Bar magnet b) Horse shoe magnet c) electromagnet d) Refrigerator 4) Which statement is true? a) All electromagnets are the same strength b) All electromagnets are permanent c) All electromagnets cannot be turned off. d) All electromagnets have coils of wire on an iron core. 5) Which of these is not a part of an electromagnet? a) wire b) battery c) needle d) iron core 6) Electromagnets are a) permanent b) temporary c) instant d) stable 7) What makes an electromagnet work? a) electricity b) water c) paper clips d) fire 8) Electric current flowing through a wire produces a) static current b) a closed circuit c) a magnetic field d) an open circuit 9) It is a type of magnet that only works when there is current flowing through it. a) Button magnet b) Electromagnet c) Bar magnet d) Horse shoe magnet 10) Which of these things will you NOT need to carry out an experiment to test the strength of an electromagnet? a) battery b) iron nail c) wire d) compass

Electromagnet

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