Below is a picture of an electromagnet made by wrapping a wire around an iron nail and connecting it to a battery. The electromagnet can be turned off by disconnecting it from the battery. A teacher helps students perform 2 experiments to test the variables that affect the electromagnet’s magnetic strength.

Question

Experiment 1

The students build an electromagnet using a 4.5 volt battery connected to an iron nail with coils wrapped around it. They change the number of coils around the nail and record how many paperclips the electromagnet can pick up each time. The results are shown in the table below.

Experiment 2

In the second experiment, the students keep the same number of coils around the nail and records how many paperclips the electromagnet can pick up using different batteries.



Which question can be answered based on the results of Experiment 2?

(1 point)
Responses

How is the strength of an electromagnet affected by the number of coils around the nail?
How is the strength of an electromagnet affected by the number of coils around the nail?

How is the voltage of an electromagnet affected by the number of coils wrapped around the nail?
How is the voltage of an electromagnet affected by the number of coils wrapped around the nail?

How is the strength of an electromagnet affected by the voltage of the battery?
How is the strength of an electromagnet affected by the voltage of the battery?

How does the voltage of an electromagnet change when the type of paper clips changes?

Answer 1

The question that can be answered based on the results of Experiment 2 is:

How is the strength of an electromagnet affected by the voltage of the battery?

This is because in Experiment 2, the students are changing the battery (which affects the voltage) while keeping the number of coils around the nail constant. This allows them to observe how variations in voltage influence the strength of the electromagnet.