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Questions  

The magnetic force acting on a charged particle of charge 2  μC in a magnetic field of 2 T acting in y direction, when the particle velocity is 2i^  +  3j^×  106  ms1, is

a
8 N in -z direction
b
4 N in z direction
c
8 N in y direction
d
8 N in z direction

detailed solution

Correct option is A

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→.Magnetic Lorentz force F→ =  q→ V→ × B→=− 2 ×  10−6  2  × 2 × 106 k^= 8 N along negative z-axis

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