+1 vote
in JEE by (20 points)

Consider a current carrying wire (current I) in shape of circle. Note that as the current progress

along the wire , the direction j(current density) changes in exact manner, while current I remain

unaffected. The agent that is essentially responsible is :-

  1. Source of EMF
  2. Electric field produced by charge accumulated on the surface of wire
  3. The charges just behind a given behind segment of wire which push them just right way by repulsion.
  4. The charges ahead

Please log in or register to answer this question.

1 Answer

0 votes
by (128k points)

Current per unit area (taken normal to the current), I/A, is called current density and correct option is (D)

No related questions found

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.