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NEET2011PhysicsMagnetic Effects of CurrentActual

A square loop, carrying a steady current I , is placed in a horizontal plane near a long straight conductor carrying a steady current I₁ at a distance d from the conductor as shown in figure. The loop will experience

Options

  1. Aa net repulsive force away from the conductor
  2. Ba net torque acting upward perpendicular to the horizontal plane
  3. Ca net torque acting downward normal to the horizontal plane
  4. Da net attractive force towards the conductor

Correct answer

D. a net attractive force towards the conductor

Step-by-step solution

aligned & F ₂=- F ₄ & F ₁= ₀ I₁ I l 2 d & F ₂= ₀ I₁ I l 2 (d+l) & F ₁> F ₃ & F_ net =F₁-F₃ aligned So, wire atrract loop.

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