1) Which of these is a magnetic material? a) Glass Cup b) Plastic spoon c) Iron nail d) Wooden spoon 2) What happens when two north poles are brought close together? a) They attract b) They repel c) Nothing happens d) They stick together 3) True or False: Magnets have only one pole. a) True b) False 4) Which device uses an electromagnet? a) Doorbell b) Candle c) Chalkborad d) Pencil 5) What is needed to make an electromagnet? a) Magnet and rubber b) Plastic tube and string c) Water and salt d) Iron nail, wire, and battery 6) True or False: Electromagnets work without electricity. a) True b) Flase 7) Which part of an electromagnet carries the current? a) Iron Core b) Battery c) Copper Wire d) Magnet 8) How can you make an electromagnet stronger? a) Increase the number of wire coils b) Remove the battery c) Use fewer coils d) Use a plastic core 9) What is the difference between a permanent magnet and an electromagnet? a) Electromagnets are always on b) Electromagnets need electricity to work c) Permanent magnets need electricity d) They are the same 10) Which of these is NOT a use of magnets? a) MRI machine b) Compass c) Microwave d) Fridge door

Electromagnet Challenge

הדפסה
הטבעה

לוח תוצאות מובילות

סגנון חזותי

אפשרויות

החלף תבנית

האם לשחזר את הנתונים שנשמרו באופן אוטומטי: ?