Lines of the magnetic field produced by a long straight wire carrying a current are:
Correct answer: A. Circles that are concentric with the wire
- A. Circles that are concentric with the wire
- B. Opposite to the direction of the current
- C. Radially outward from the wire
- D. Radially inward towards the wire
Explanation
The magnetic field lines created by a current in a long, straight wire form concentric circles in a plane perpendicular to the wire. The direction of these circular lines is determined by the right-hand grip rule.
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About Electromagnetism
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
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