Discussion
A student applies Gauss's law to a finite line charge with a coaxial cylinder and obtains the infinite-line result. The error is that
Answer: C
Near the ends of a finite line the field has an axial component and its magnitude varies along the cylinder, so it cannot be taken outside the integral. The infinite-line formula is a good approximation only near the middle of a long line.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development