JEE Advanced 2006
- Exam
- JEE Advanced
- Year
- 2006
- Subject
- Physics
- Chapter
- Magnetic Effects of Current
JEE Advanced 2006 · Physics · Magnetic Effects of Current
Which of the following statement is correct in Infinitely long wire...
to the paper carrying current inwards the given figure?


Options
- Anet force on the loop is zero
- Bnet torque on the loop is zero
- Cloop will rotate clockwise about axis when seen from
- Dloop will rotate anti-clockwise about when seen from
Correct answer
A. net force on the loop is zero
Step-by-step solution
, because magnetic lines are parallel to this wire.
, because magnetic lines are antiparallel to this wire.
is perpendicular to paper inwards and is perpendicular to paper outwards. These two forces (although calculated by integration) cancel each other but produce a torque which tend to rotate the loop in clockwise direction about an axis .