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4. A proton (charge +e = 1.602x 10^-19 C) moves a distance d = 0.50 m...

4. A proton (charge +e = 1.602x 10^-19 C) moves a distance d = 0.50 m in a straight line between points a and b in a linear accelerator. The electric field is uniform along this line, with magnitude E = 1.5x10^7 N/C in the direction from a to b.

Determine

(a) the work done on the proton by the field;

(b) the potential difference Va - Vb.

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