試題詳解

13. A magnetic field is directed out of the page. Two charged particles enter from the top and take the paths shown in the figure. Which statement is correct?
(A) Particle 1 has a positive charge and particle 2 has a negative charge.
(B) Particle 1 has a negative charge and particle 2 has a positive charge.
(C) Both particles are negatively charged.
(D) Both particles are positively charged.
(E) The direction of the paths depends on the magnitude of the velocity, not the sign of the charge.