# Difference between electrostatic and magnetic field [closed]

In this, F (the force set by the field) is perpendicular to the speed of the particle. In which case does F change the absolute value of V? Why or why not?

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## closed as too localized by user1504, Emilio Pisanty, akhmeteli, Waffle's Crazy Peanut, Manishearth♦Apr 26 '13 at 9:20

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