A particle of charge \( q \) and mass \( m \) is moving along the \( x \)-axis with a velocity \...

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A particle of charge \( q \) and mass \( m \) is moving along the \( x \)-axis with a velocity \( v \) and enters a region of electric field \( \mathbf{E} \) and magnetic field \( \mathbf{B} \) as shown in figure below. For which figure the net force on the charge may be zero?
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