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# 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. The ink drops have a mass m = 1.00ÃƒƒÃ‚—10^?11kg each and leave the nozzle and travel horizontally toward the paper at velocity v = 19.0m/s . The drops pass through a charging unit that gives each drop a positive charge qby causing it to lose some electrons. The drops then pass between parallel deflecting plates of length D 2.15 cm , where there is a uniform vertical electric field with magnitude E = 8.10ÃƒƒÃ‚—10^4N/C Part A If a drop is to be deflected a distance d = 0.270mm 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 1000kg/m3 , and ignore the effects of gravity. Express your answer numerically in coulombs.

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.

The ink drops have a mass m = 1.00ÃƒƒÃ‚—10^?11kg each and leave the nozzle and travel horizontally toward the paper at velocity v = 19.0m/s . The drops pass through a charging unit that gives each drop a positive charge qby causing it to lose some electrons. The drops then pass between parallel deflecting plates of length D 2.15

cm , where there is a uniform vertical electric field with magnitude E = 8.10ÃƒƒÃ‚—10^4N/C

Part A If a drop is to be deflected a distance d = 0.270mm 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 1000kg/m3 , and ignore the effects of gravity. Express your answer numerically in coulombs.

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