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As shown in figure a dust particle with ...

As shown in figure a dust particle with mass m = 5.0 × 10–9 kg and charge q0 = 2.0 nC starts from rest at point a and moves in a straight line to point b . What is its speed v at point b?

A

`26 ms^(-1)`

B

`34 ms^(-1)`

C

`46 ms^(-1)`

D

`14 ms^(-1)`

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