Electrically neutral ink droplets in an ink-jet printer pass through an electron beam created by an electron gun, as shown in the figure above. Some electrons are captured by the ink droplet, so that it becomes charged. After passing through the electron beam, the net charge of the ink droplet is ? ink drop =−1×10^-10C. How many electrons are captured by the ink droplet?
A. −6×10^8
B. 6×10^8
C. 1.6×10^-29
D. 1.6×10^-9
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