A wire carries a current out of the page. Which diagram below correctly describes the magnetic field of the wire?
Correct answer: D. Option D
- A. Option A
- B. Option B
- C. Option C
- D. Option D
- E. Option E
Explanation
The magnetic field lines form concentric circles around the wire. If you wrap your right hand's fingers around the wire with your thumb pointing in the direction of the current, then the direction in which the fingers curl will give the direction of the magnetic field. As the current is directed out of the page, then the magnetic field will have a counter clockwise direction. So "D" is the correct answer.
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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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