A movig particle encounters an external electric field that decreases its kineti
ID: 2127554 • Letter: A
Question
A movig particle encounters an external electric field that decreases its kinetic energy from 9810 eV to 6180 eV as the particle moves from position A to position B. The electric potential at A is -46.0 V, and that at B is +33.0 V. Determine the charge of the particle. Include the algebraic sign (+ or -) with your answer.
Explanation / Answer
q =(K1-K2)/(V2-V1)
q=(9810-6180)(1.6*10^-19)/(33-(-46))
q= +7.35*10^-18 C