1) What are the parts of an electromagnet? a) iron core b) solenoid c) crocodile clips d) battery e) lightbulb f) door 2) What are some uses of electromagnets? a) locking doors b) pens c) sticking magnets to a fridge d) making car keys 3) Why are electromagnets useful? (Choose 2!) a) The strength of electromagnets can be controlled b) They can be turned on and off c) They have lots of coils d) They are  4) Which of the following will increase the strength of an electromagnet? a) increasing the number of coils b) increasing the number of turns of a coil c) decreasing the current d) decreasing the number of coils 5) Which of the following will increase the strength of an electromagnet? a) Increasing the current b) increasing the number of coils c) increasing the length of the wire d) putting a bulb in the circuit 6) Which of the following will increase the strength of an electromagnet? a) Adding an iron core b) increasing the number of coils c) decreasing the current d) increasing the length of the wire. 7) What is the name of the wire coil used in an electromagnet? a) solenoid b) spiral c) cylinder d) stimulate e) solar cell

Electromagnets

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