In an inkjet printer, letters and images are created by squirting drops of ink horizontally at a sheet of paper from a rapidly moving nozzle. The pattern on the paper is controlled by an electrostatic valve that determines at each nozzle position whether ink is squirted onto the paper or not.
In an inkjet printer, letters and images are created by squirting drops of ink horizontally at a sheet of paper from a rapidly moving nozzle. The pattern on the paper is controlled by an electrostatic valve that determines at each nozzle position whether ink is squirted onto the paper or not.
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Transcribed Image Text:In an inkjet printer, letters and images are created by squirting
drops of ink horizontally at a sheet of paper from a rapidly
moving nozzle. The pattern on the paper is controlled by an
electrostatic valve that determines at each nozzle position
whether ink is squirted onto the paper or not.
Figure
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Do-
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The ink drops have a mass m = 1.00×10-11 kg each and leave the nozzle and travel horizontally toward the paper at velocity v = 25.0 m/s. The drops
pass through a charging unit that gives each drop a positive charge q by causing it to lose some electrons. The drops then pass between parallel deflecting
plates of length Dº = 1.85 cm, where there is a uniform vertical electric field with magnitude E = 7.85×104 N/C . (Figure 1)
Part A
If a drop is to be deflected a distance d = 0.350 mm by the time it reaches the end of the deflection plate, what magnitude of charge q must be given to
the drop? Assume that the density of the ink drop is 1000 kg/m³, and ignore the effects of gravity.
Express your answer numerically in coulombs.
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