To make the field stronger near the coil of the galvanometer, we place inside the coil a:
Correct answer: A. Soft iron cylinder
- A. Soft iron cylinder
- B. Soft steel cylinder
- C. Soft copper cylinder
- D. None of these
Explanation
Soft iron is a ferromagnetic material that can easily become magnetised in the presence of an external magnetic field. When placed inside the coil of the galvanometer, the soft iron cylinder concentrates and strengthens the magnetic field produced by the coil. This increase in magnetic field strength improves the sensitivity and accuracy of the galvanometer.
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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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