Share Ch.11 - Electromagnetism
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How can you make an electromagnet with wire, a nail, and a battery? (Draw how the parts would be arranged.)
wire coiled around nail, ends connected to a battery to create a circuit
Name 2 ways to make a simple electromagnet stronger.
add more loops around the nail, use a stronger battery, use a larger nail
Items made of metal allow electricity to move through them. We call these ________________.
conductors
Items that do not allow electricity to move through them are known as ________________.
insulators
Choose: electric field, magnetic field, both, or neither - - These lines are always straight.
neither
Choose: electric field, magnetic field, both, or neither - - These lines are always curved.
both
Choose: electric field, magnetic field, both, or neither - - These lines travel out in only one direction.
neither
Choose: electric field, magnetic field, both, or neither - - These lines travel out from the source in all directions.
both
Choose: electric field, magnetic field, both, or neither - - These lines get farther apart as they travel out from the source.
both
Choose: electric field, magnetic field, both, or neither - - These lines are closest together at the poles
magnetic field
Describe the 2 magnets that would be formed when a single magnet is broken in half.
2 new magnets, each with a north and south pole
If a magnet is broken in half and the 2 pieces are held back together, will they attract or repel? (Draw a diagram to explain why.)
attract, because one pole is N and the other is S
A wire coiled around a metal core is called a solenoid. What will make a solenoind stronger - more loops, fewer loops, or spaced-out loops?
more loops
What happens to magnetic and electric fields as distance from the soure increases?
they get weaker
What types of materials will attract to a magnet?
feromagnetic (contains iron, nickel, or cobalt)
Where is a magnet the strongest?
at the poles
