Two different experiments are performed. In the first experiment, a constant force

F is applied to a hydrogen ion.
A. Experiment 1: Electrical force; Experiment 2: Gravitational force
B. Experiment 1: Magnetic force; Experiment 2: Electric force
C. Experiment 1: Gravitational force; Experiment 2: Magnetic force
D. Experiment 1: Electric force; Experiment 2: Magnetic force