What happens to the magnetic field strength when the distance from a long straight conductor is doubled?

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It doubles
It halves
It remains the same
It quadruples

Questions & Step-by-step Solutions

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Q: What happens to the magnetic field strength when the distance from a long straight conductor is doubled?

Solution: The magnetic field strength around a long straight conductor decreases inversely with distance, so it halves when the distance is doubled.

Steps: 6

Step 1: Understand that a long straight conductor (like a wire) creates a magnetic field around it when electric current flows through it.
Step 2: Know that the strength of this magnetic field depends on the distance from the wire.
Step 3: Remember the rule: the magnetic field strength decreases as you move away from the wire.
Step 4: When you double the distance from the wire, the magnetic field strength is affected.
Step 5: Specifically, the magnetic field strength becomes weaker by half (it is inversely proportional to the distance).
Step 6: Therefore, if you double the distance, the magnetic field strength is halved.

What happens to the magnetic field strength when the distance from a long straight conductor is doubled?

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