Directions: Use the information provided and your knowledge of Physical Science to answer the following questions. Show all work where necessary.
Directions: Use the information provided and your knowledge of Physical Science to answer the following questions. Show all work where necessary.
Diagram 1.
Source:
https://sciencewiz.com/distance-learning/inventions/lesson-1/
An electromagnet made by wrapping wire around an iron nail can lift paper clips. When the coil has more loops of wire, the electromagnet can lift more paper clips, showing a stronger magnetic force.
Magnetic forces can be produced by permanent magnets, but they can also be produced by moving electric charges. An electromagnet is a magnet created when an electric current flows through a wire. When the wire is wrapped into coils around an iron core (like a nail), the magnetic effect becomes much stronger.
In an electromagnet, the electric current moving through the wire creates a magnetic field around the wire. When the wire is wrapped into a coil, the magnetic fields from each loop add together. This means the number of coil turns can affect the strength of the magnetic field. More turns can create a stronger magnetic field, which can lead to a stronger magnetic force on nearby magnetic objects.
Scientists often measure magnetic force strength using data that can be collected safely in a classroom. One common method is to count how many paper clips an electromagnet can lift. Lifting more paper clips indicates a stronger magnetic force. By changing only one factor at a time and recording results, students can identify patterns and determine which factors affect force strength.
Diagram 2.
Source: https://www.thesciencehive.co.uk/electromagnetism-gcse
In this investigation, the key factor tested is the number of coil turns. To make the data meaningful, other factors should stay the same, such as the battery type, the same nail core, and the same type of paper clips. If the data show that increasing the number of coil turns increases the number of paper clips lifted, that provides evidence that coil turns affect the strength of magnetic force.
Table 1.
Coil Turns | Paper Clips Lifted | Change From Lowest |
|---|---|---|
10 | 2 | 0 |
20 | 5 | 3 |
30 | 9 | 7 |
40 | 14 | 12 |
50 | 20 | 18 |
Graph of Information - Figure 1.
Graph of Information - Figure 2.
Using the reading, explain how an electromagnet can produce a magnetic force only when electric current is flowing.
Using Diagram 1, describe one visible difference between a weaker electromagnet and a stronger electromagnet.
Which statement best describes the pattern shown in Table 1?
How does Diagram 2 help explain why adding more coil turns changes the strength of the magnetic force?
Which conclusion is best supported by Figures 1 and 2?
A student claims: “If you increase the number of wire loops in an electromagnet, the magnetic force gets stronger.” Do you agree or disagree? Use evidence from the investigation to support your answer.
Claim:
Evidence:
Reasoning: