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+1 vote
61.6k views
in Physics by (36.3k points)
edited by

A particle of mass m and charge q has an initial velocity vector v = v0j. If an electric field vector E = E0i and magnetic field vector B = B0i act on the particle, its speed will double after a time:

2 Answers

+1 vote
by (51.9k points)
selected by
 
Best answer

Answer is (3) 

As vector v = v0j

(magnitude of velocity does not change in y–z plane)

(2v0)2 = v02 + vx2

+1 vote
by (33.0k points)

The correct answer is (3) 

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