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NEET2009PhysicsMagnetic Effects of CurrentActual

The magnetic force acting on a charged particle of charge -2 C in a magnetic field of 2 ~T acting in y direction, when the particle velocity is (2 i +3 j ) 10^6 ~ms ⁻¹ is

Options

  1. A8 ~N in - z direction
  2. B4 ~N in z direction
  3. C8 ~N in y direction
  4. D8 ~N in z direction

Correct answer

A. 8 ~N in - z direction

Step-by-step solution

Key Idea: When a charge q moves with velocity v inside magnetic field of strength B , then force on charge is called magnetic Lorentz force. The magnetic Lorentz force is in the direction of vector v B aligned & Magnetic Lorentz force F =q( v B ) &=-2 10⁻⁶ [2 2 10^6 ] &=8 ~N along negative -axis aligned

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