If you have two long wires carrying equal current in opposite directions, then t

Question

If you have two long wires carrying equal current in opposite directions, then the magnetic field is strongest at what location?

1. At the surface of each wire
2. Along the center line between each wire


What is the pinch effect?
1. The increase in resistance when a conductor's diameter narrows at point along a wire
2. The change in a B-field when a conductor bends at a right angle.
3. The magnetic attraction between parallel current elements within one conductor
4. The magnetic attraction between parallel currents in two separate conductors

Explanation / Answer

Given If two long wires carrying equal current in opposite directions, then the magnetic field is strongest along the center line between each wire . Because Ampere's law gives us that the magnetic field around a current varrying wire is at a distance from the center of the wire So, option 2 is correct Pinch Effect: The magnetic attraction between parallel current elements within one conductor Option 3 is correct

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