All the magnetic materials lose their magnetic properties when
Correct answer: C. dipped in oil
- A. dipped in water
- B. brought near a piece of iron
- C. dipped in oil
- D. strongly heated
Explanation
Dipping magnetic materials in oil does not affect their magnetic properties. This option is incorrect; in fact, it helps to prevent corrosion and oxidation of the magnetic material. Magnetic materials lose their magnetic properties temporarily when exposed to strong heat or if they are strongly heated, not when dipped in oil.
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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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