physics

posted by .

how can i use a compass to determine whether a needle is magnetized?

put the needle in a cup of water very carefully. It will float. Now if the needle is magnetized it will point north/south no matter how you carefully rotate the cup. You can check the direction with a compass.

Point the end of the needle at one end of the compass needle. Depending upon which end you pick, the compass needle will move toward or away from the needle that you are holding, IF the needle is magnetized.

Iron filings are very handy to determine if anything is magnetized. You can make your own filings by filing on a piece of iron. THe filings will stick to magenetized things.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chem

    plz help If you carefully place a steel razor blade flat on the surface of water, the razor blade can be made to float. Explain this result, given that the density of steel is much greater than that of water. I'm not really sure what …
  2. Physics

    If you lay a steel needle horizontally on water, it will float. If you place the needle vertically into the water, it will sink. Explain why. It is because of surface tension. The hydrogen molecules bond with the steel of the needle. …
  3. Physics

    If you lay a steel needle horizontally on water, it will float. If you place the needle vertically into the water, it will sink. Explain why. Think about surface tension, and what causes it. I will be happy to critique your thinking.
  4. Physical Science

    What is the net magnetic force on a compass needle?
  5. science please!

    1. Why is the electric potential midway between a dipole equal to zero?
  6. biology

    Zola has a splinter in her finger. which of the following actions should she take before she uses a sewing needle to remove the splinter?
  7. 11th grade Physics

    A long,straight current-carrying wire runs from north to south. A) A compass needle placed above the wire points with its N-pole toward the east. In what direction is the current flowing?
  8. pharmacology

    1. Which one of the following drugs would you instruct a patient to take during a fasting period?
  9. Physics

    A small compass is held horizontally, the center of its needle a distance of 0.460 m directly north of a long wire that is perpendicular to the earth's surface. When there is no current in the wire, the compass needle points due north, …
  10. physics

    A straight copper conductor is held parallel to the axis of a freely suspended magnetic needle such that the conductor is under the needle and the current is flowing from south to north. In which direction the north of magnetic needle …

More Similar Questions