An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
Answer (1)
The strength of an electromagnet is directly proportional to the current flowing through it.
Compare the current values for each electromagnet: W (2), X (5), Y (8), Z (3).
Electromagnet Y has the highest current (8 amperes).
Therefore, electromagnet Y is the strongest. Electromagnet Y is the strongest.
Explanation
Understanding the Problem We are given a table that shows the current (in amperes) of four different electromagnets: W, X, Y, and Z. The strength of an electromagnet is directly proportional to the current flowing through it. This means that a higher current corresponds to a stronger electromagnet.
Objective We need to determine which of the given conclusions is best supported by the data. To do this, we will compare the current values for each electromagnet and see which statement aligns with the data.
Analyzing the Conclusions Let's analyze each conclusion:
Electromagnet W is the strongest: This would be true if electromagnet W had the highest current. However, the current for W is 2 amperes, which is not the highest.
Electromagnet X is weaker than electromagnet Z: This would be true if the current for X was less than the current for Z. The current for X is 5 amperes, and the current for Z is 3 amperes. Since 5 > 3, this statement is false.
Electromagnet Y is the strongest: This would be true if electromagnet Y had the highest current. The current for Y is 8 amperes, which is the highest among the four electromagnets.
Electromagnet Y is weaker than electromagnet X: This would be true if the current for Y was less than the current for X. The current for Y is 8 amperes, and the current for X is 5 amperes. Since 8 > 5, this statement is false.
Conclusion Based on our analysis, the conclusion that is best supported by the data is that electromagnet Y is the strongest, as it has the highest current (8 amperes).
Examples
Electromagnets are used in many devices, such as motors, generators, and transformers. The strength of an electromagnet is determined by the amount of current flowing through it. For example, in a scrapyard, a strong electromagnet is used to lift heavy pieces of metal. The stronger the electromagnet, the heavier the metal it can lift. Understanding the relationship between current and electromagnet strength helps engineers design more efficient and powerful devices.
