A proton (mass

PHYSICS · Subjective · CBSE · Physics · Electrostatic Potential and Capacitance · Electrostatic Potential and Capacitance

Problem

A proton (mass

1.67\times10^{-27}\,\text{kg}

, charge

+1.60\times10^{-19}\,\text{C}

) enters a device with a speed of

9.0\times10^{4}\,\text{m/s}

. Inside the device it moves through a

1.2\,\text{kV}

decrease in electric potential while simultaneously losing

3.5\times10^{-17}\,\text{J}

of energy to a resistive force. Determine the proton’s final speed as it exits the device.