Questions: 5. Several students are discussing how they could use what they know about compasses and magnetic fields to test whether an electric current can cause a magnetic field. Select which students' investigation would provide evidence that an electric current through a wire can cause a magnetic field. Student 1: I think we should attach a wire to a current meter, then bring a magnet near the wire. If there is a current in the wire, that means that a current can cause a magnetic field. Student 2:1 think we should place a compass near some wire. Then we can attach the wire to a battery. If the compass deflects when the wire is connected to the battery, then there must be a magnetic field. Student 3: I agree we should place a compass near some wire, but why do we need the battery? If the compass deflects when it is near the wire, there must be a magnetic field caused by the current.

5. Several students are discussing how they could use what they know about compasses and magnetic fields to test whether an electric current can cause a magnetic field.

Select which students' investigation would provide evidence that an electric current through a wire can cause a magnetic field.
Student 1: I think we should attach a wire to a current meter, then bring a magnet near the wire. If there is a current in the wire, that means that a current can cause a magnetic field.
Student 2:1 think we should place a compass near some wire. Then we can attach the wire to a battery. If the compass deflects when the wire is connected to the battery, then there must be a magnetic field.
Student 3: I agree we should place a compass near some wire, but why do we need the battery? If the compass deflects when it is near the wire, there must be a magnetic field caused by the current.

Transcript text: 5. Several students are discussing how they could use what they know about compasses and magnetic fields to test whether an electric current can cause a magnetic field. Select which students' investigation would provide evidence that an electric current through a wire can cause a magnetic field. Student 1: I think we should attach a wire to a current meter, then bring a magnet near the wire. If there is a current in the wire, that means that a current can cause a magnetic field. Student 2:1 think we should place a compass near some wire. Then we can attach the wire to a battery. If the compass deflects when the wire is connected to the battery, then there must be a magnetic field. Student 3: I agree we should place a compass near some wire, but why do we need the battery? If the compass deflects when it is near the wire, there must be a magnetic field caused by the current.

Solution

Solution Steps

Step 1: Understanding the Problem

The problem involves determining which student's investigation would provide evidence that an electric current through a wire can cause a magnetic field. We need to evaluate each student's proposal to see if it effectively tests the hypothesis.

Step 2: Analyzing Student 1's Proposal

Student 1 suggests attaching a wire to a current meter and bringing a magnet near the wire. This setup tests whether a magnet can induce a current in the wire, not whether a current can create a magnetic field. Therefore, this does not provide evidence for the hypothesis.

Step 3: Analyzing Student 2's Proposal

Student 2 proposes placing a compass near a wire and then connecting the wire to a battery. If the compass deflects, it indicates the presence of a magnetic field caused by the electric current in the wire. This setup directly tests the hypothesis and would provide evidence that an electric current can cause a magnetic field.

Step 4: Analyzing Student 3's Proposal

Student 3 suggests placing a compass near a wire without using a battery. Without a current flowing through the wire, there would be no magnetic field generated by the wire. Therefore, this setup cannot test the hypothesis effectively.

Final Answer

The investigation proposed by Student 2 would provide evidence that an electric current through a wire can cause a magnetic field. \(\boxed{\text{Student 2}}\)

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