solve with values given A movig particle encounters an external electric field t

Question

solve with values given

A movig particle encounters an external electric field that decreases its kinetic energy from 9160 eV to 6010 eV as the particle moves from position A to position B. The electric potential at A is -65.0 V, and that at B is +40.0 V. Determine the charge of the particle. Include the algebraic sign (+ or -) with your answer.

A moving particle encounters an external electric field that decreases its kinetic energy from 9160 eV to 6010 eV as the particle moves from position A to position B. The electric potential at A is -65.0 V, and that at B is +40.0 V. Determine the charge of the particle. Include the algebraic sign (+ or -) with your answer.

Explanation / Answer

we have cja=hange inKE= gain inPE

so6010-9160=40q+65q

so q= -30e

where e=1.6*10^-19

so q=-4.8*10^-19 C

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