The magnetic field due to the electric current in a conducting straight wire is:
Correct answer: B. Circular around the conducting wire
- A. Towards the centre of the conducting wire
- B. Circular around the conducting wire
- C. In the direction of the electric current
- D. In the direction opposite to the electric current
Explanation
The magnetic field lines created by a current in a long, straight wire form concentric circles. These circles lie in a plane that is perpendicular to the wire, with the wire at their center. The direction is given by the right-hand 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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