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NEET 2008
Exam
NEET
Year
2008
Subject
Physics
Chapter
Magnetic Effects of Current

NEET 2008 · Physics · Magnetic Effects of Current

A closed loop PQRS carrying a current is placed in a uniform...

A closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments PS, SR and RQ are F1,F2F_1, F_2 and F3F_3 respectively and are in the plane of the paper and along the directions shown, the force on the segment QP isA closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments PS, SR

Options

  1. AF3−F1+F2F_3-F_1+F_2
  2. BF3−F1−F2F_3-F_1-F_2
  3. C\sqrt{\left(F_3-F_1\right)^2+F_2^2}
  4. D\sqrt{\left(F_3-F_1\right)^2-F_2^2}

Correct answer

C. \sqrt{\left(F_3-F_1\right)^2+F_2^2}

Step-by-step solution

A closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments PS, SR
Since net force on current carrying loop in uniform magnetic field is zero therefore force on remaining segment will be equal and oppsoite to F\mathrm{F}.
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