When the north pole of a magnet is moved towards the face of a coil, then the face of the coil acts as
Correct answer: B. south pole
- A. north pole
- B. south pole
- C. neutral
- D. we cannot predict about it
Explanation
B is the correct answer. When the north pole of a magnet is moved towards the face of a coil, it induces a current in the coil. According to Lenz's law, the induced current produces a magnetic field that opposes the change in the magnetic flux. Therefore, the face of the coil acts as a south pole to repel the approaching north pole of the magnet.
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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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