A) circle
B) parabola
C) helix
D) straight line
Correct Answer: D
Solution :
When a proton enters a magnetic field, force acts on it, given by \[F=qvB=qv\times B\text{ }sin\theta \] Given, \[\theta =0\](parallel)\[\sin {{0}^{o}}=0\] \[\therefore \] \[F=0\] Comparing with equation of straight line passing through origin.You need to login to perform this action.
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