Question

" Karin wants to remove iron shavings from a pile of sand. Karin has refrigerator magnets. She also has batteries, insulated wire, iron bolts, and tape. Select the correct button to show whether each statement is true of an electromagnet, a permanent magnet, or both. Some rows may have more than one button selected.

a) Electromagnet
b) Permanent Magnet
c) Both"

Answer 1

An electromagnet is created when an electric current is passed through a coil of wire, while a permanent magnet has a magnetic field inherent to the material. The correct answers are: (a) Permanent Magnet, (b) Both, (c) Neither, (d) Neither, (e) Neither, (a) Neither, (b) Neither, (c) Neither. (a) Electromagnet, (b) Permanent Magnet.

Step-by-step explanation:

Based on the information provided, an electromagnet refers to a magnet that is created when an electric current is passed through a coil of wire, while a permanent magnet has a magnetic field that is inherent to the material itself. From the given statements:

1. Use a magnet - Permanent Magnet
2. Magnetism - Both
3. Ag - Neither
4. KBr - Neither
5. CO2 - Neither
6. Sodium bromide - Neither
7. Barium sulphate - Neither
8. Sulphur dioxide - Neither

Regarding the knitting needle and paper clips, rubbing a bar magnet along a metal object can induce a temporary magnetic field, making it an electromagnet, which then attracts the paper clips - Electromagnet. Finally, based on Figure 22.10, both electromagnets and permanent magnets have the same basic characteristics and can attract and repel like poles as well as display similar patterns of iron filings - Both.

Therefore, the correct answers are: (a) Permanent Magnet, (b) Both, (c) Neither, (d) Neither, (e) Neither, (a) Neither, (b) Neither, (c) Neither. (a) Electromagnet, (b) Permanent Magnet.