To make the field radial in a moving coil galvanometer
Correct answer: C. poles pieces cut concave
- A. the number of turns in the coil is increased
- B. magnet is taken in the form of a horseshoe
- C. poles pieces cut concave
- D. coil is wound on an aluminum frame
Explanation
C is the correct answer. To make the field radial in a moving coil galvanometer, the poles pieces are cut concave to provide a radial magnetic field. This ensures that the magnetic field lines are perpendicular to the plane of the coil, which is necessary for accurate measurements.
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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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