The magnetic field density outside the solenoid is _.
Correct answer: C. Negligible
- A. Strong
- B. Infinite
- C. Negligible
- D. None of these
Explanation
The magnetic field lines in a solenoid are mainly concentrated inside its coils, creating a strong and uniform magnetic field there. Outside the solenoid, the field lines spread out and the field becomes weak, making it negligible. This is why solenoids are used to create strong internal magnetic fields, while the external field is not significant. Option C is correct because it accurately describes the magnetic field outside a solenoid as negligible. Options A and B are incorrect as they overestimate the strength of the external field, and option D is incorrect because option C is the correct characterization.
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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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