Factors Affecting the Strength of an Electromagnet

1. An electromagnet can be made stronger by using _________.

• A. only one cell or battery

• B. more cells or batteries

• C. more pins

• D. electricity

2. When you use 2 or more batteries, then there is a/an ________ in its current.

• A. magnetic field

• B. no change

• C. increase

• D. decrease

3. This is a temporary magnet that may be produced by making

electricity flow through a wire coiled around an iron nail.

• A. electromagnet

• B. magnetism

• C. electricity

• D. dry cells

4. Nails can be turned into magnet by_____________.

• A. coiling a wire around it and letting the electricity flow into it

• B. coiling a wire around the dry cells or batteries.

• C. coiling dry cells or batteries in the wire

• D. letting the electricity pass through it

5. How can you increase the strength of an electromagnet?

• A. by letting the electricity pass through it

• B. by adding more dry cells or batteries

• C. by adding the more magnets

• D. by adding longer wires