Two particles move into a magnetic field. They enter moving at the same speed and direction. The magnitude of the charge on each is known to be the same. One particle curls to the right and the other to the left upon entering the field, the leftward moving particle moves in a larger circle than the rightward moving particle. From this we can say that
A. the leftward moving particle has more mass and is positively charged.
B. the leftward moving particle has more mass and its charge is opposite the other particle.
C. the rightward moving particle has less mass and is positively charged.
D. the rightward moving particle has positive charge but we cannot say anything about its mass.
Answer: B
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