A particle with charge is released from rest at point X
PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
A particle with charge −2.0μC is released from rest at point X, where the electric potential is 0V. It subsequently moves to point Y, where the electric potential is +50V. Which statement best describes the change in the particle’s kinetic energy during this motion?
(a) It remains zero because the initial potential at X is defined to be zero.
(b) It decreases by 1.0×10−4J because the particle moves to a region of higher potential.
(c) It increases by 1.0×10−4J because the system’s potential energy decreases by that amount.
(d) It increases by 1.0×10−4J because the system’s potential energy increases by that amount.