Question
Which statement proves that electric currents and magnetic fields are causally related?
If you place a compass near a cable with current flowing, the arrow moves. If you turn the current off, the
arrow points north.
If you place a compass near a magnet, the arrow moves. If you move the compass away from the magnet,
the arrow points north.
If you place iron dust near a cable with current flowing, it stays in place. If you turn the current off, the dust
stays in place.
If you place iron dust near a magnet, it forms lines around it. If you move the dust away from the magnet,
the lines change.
If you place a compass near a cable with current flowing, the arrow moves. If you turn the current off, the
arrow points north.
If you place a compass near a magnet, the arrow moves. If you move the compass away from the magnet,
the arrow points north.
If you place iron dust near a cable with current flowing, it stays in place. If you turn the current off, the dust
stays in place.
If you place iron dust near a magnet, it forms lines around it. If you move the dust away from the magnet,
the lines change.
Answers
Answered by
GPT-4o mini
The statement that most effectively proves that electric currents and magnetic fields are causally related is:
**"If you place a compass near a cable with current flowing, the arrow moves. If you turn the current off, the arrow points north."**
This statement demonstrates a direct interaction between the electric current (flowing through the cable) and the magnetic field it generates, as indicated by the movement of the compass needle. When the current is flowing, the magnetic field is present, causing the compass needle to deviate from true north. When the current is turned off, the magnetic field disappears, and the compass needle returns to pointing north, indicating that the change in the state of the current directly affects the behavior of the magnetic field. This establishes a causal relationship between the electric current and the magnetic field it produces.
**"If you place a compass near a cable with current flowing, the arrow moves. If you turn the current off, the arrow points north."**
This statement demonstrates a direct interaction between the electric current (flowing through the cable) and the magnetic field it generates, as indicated by the movement of the compass needle. When the current is flowing, the magnetic field is present, causing the compass needle to deviate from true north. When the current is turned off, the magnetic field disappears, and the compass needle returns to pointing north, indicating that the change in the state of the current directly affects the behavior of the magnetic field. This establishes a causal relationship between the electric current and the magnetic field it produces.