# physics

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.

1. 👍 0
2. 👎 0
3. 👁 143

## Similar Questions

1. ### physics

A compass with its needle pointing north sits on a table. If you place a straight wire over the compass parallel to its needle and send a current running north to south through the wire, how does the compass needle respond to the

asked by harvey on April 30, 2019

1. Why is the electric potential midway between a dipole equal to zero? 2. How can you identify an equation as being that of a fractal? 3. How does a current carrying wire on top of a magnetized compass needle affect its

asked by Dee on October 9, 2009
3. ### Physical Science

What is the net magnetic force on a compass needle? By what mechanism does a compass needle line up with a magnetic feild?

asked by Rachel on March 16, 2008
4. ### 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?Give reasons for your answer. a- wipe the needle with a clean cloth. b- wash the needle in

asked by barbie on November 9, 2009
5. ### pharmacology

1. Which one of the following drugs would you instruct a patient to take during a fasting period? A. Buspirone; B. Probucol; C. Lisinopril; D. Oxcarbazepine I think B. 2. You're training a new employee. He wants to know how to

asked by Alisha221 on January 29, 2012
6. ### physics

A dip needle is a small magnet mounted on ahorizontal axis so that it can swivel up or down like a compass turned on it's side) where on earth will a dip needle point most nearly vertically? where will it point most nearly

asked by tina on February 5, 2008
7. ### Physics Simple Harmonic Motion

A sewing machine needle moves with a rapid vibratory motion, rather like SHM, as it sews a seam. Suppose the needle moves 8.4 mm from its highest to its lowest position and it makes 27 stitches in 8.5 s. What is the maximum needle

asked by John on April 5, 2011
8. ### 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

asked by Anonymous on February 25, 2013