In science class, students built the device pictured below using cardboard, wires, pipes, compasses, and a battery.
When there is no electricity running through the wire, all the compass needles point toward Earth’s magnetic north pole. When electric current is flowing through the wire, the compass needles change direction and point around the wire in a circle.
As part of their investigation, the students moved each compass farther from the wire and wrote down their observations. What were the students most likely testing in this part of the investigation?
Answers
Answer:
The current creates a magnetic field that exerts a force on the compass needles.
Explanation:
Answer:
The students were most likely testing how the strength of the magnetic field changes with distance from the wire. As they moved each compass farther away from the wire, they were observing how the magnetic field weakened or strengthened. This is because magnetic fields typically follow the inverse square law, which means that the strength of the field decreases as the distance from the source increases. By measuring the magnetic field strength at different distances, the students could get a sense of how the magnetic field behaves around the wire.
Explanation:
The students were most likely testing how the strength and direction of the magnetic field changes with distance from the wire when an electric current is flowing through it.
When an electric current flows through a wire, it creates a magnetic field around the wire. The direction of the magnetic field is perpendicular to the direction of the current flow and is dependent on the direction of the current flow. The strength of the magnetic field is also dependent on the amount of current flowing through the wire.
The compasses that the students used are sensitive to magnetic fields and can detect the direction and strength of the magnetic field. When there is no electric current flowing through the wire, the compass needles align with Earth's magnetic field and point towards the magnetic north pole. However, when an electric current flows through the wire, it creates a magnetic field around the wire that interacts with the compass needles and causes them to rotate around the wire in a circular pattern.
By moving the compasses farther from the wire, the students were observing how the strength and direction of the magnetic field changed with distance. The strength of the magnetic field around a wire decreases as the distance from the wire increases. So, as the compasses were moved farther from the wire, the strength of the magnetic field they detected would decrease.
The students could also observe how the direction of the magnetic field changes with distance. As the compasses are moved farther from the wire, the magnetic field direction around the wire changes from being perpendicular to the wire to being parallel to it. The direction of the magnetic field around the wire also changes with the direction of the current flow in the wire.
Overall, the students were likely testing how the strength and direction of the magnetic field created by an electric current flowing through a wire changes with distance from the wire.
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