A small particle has charge and mass

PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A small particle has charge

-5.00\,\mu\text{C}

and mass

2.00\times10^{-4}\,\text{kg}

. It moves from point

A

, where the electric potential is

V_A=+200\,\text{V}

, to point

B

, where the electric potential is

V_B=+800\,\text{V}

. The electric force is the only force acting on the particle. The particle has speed

5.00\,\text{m s}^{-1}

at point

A

. What is its speed at point

B

? Is it moving faster or slower at

B

than at

A

? Explain.