Problem 21.86 In an inkjet printer, letters are built up by squirting drops of i
ID: 2289712 • Letter: P
Question
Problem 21.86
In an inkjet printer, letters are built up by squirting drops of ink at the 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 radius of 16.0?m and leave the nozzle and travel toward the paper at a velocity of 15.0m/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 2.00cm where there is a uniform vertical electric field with a magnitude of 8.40
Explanation / Answer
q= -1.63 * 10 ^-16 C
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This is how I got this answer (It might be possible that I made a mistake in the calculation but the general solution procedure is the same, You can re-do the sums to make sure they are correct)
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The data we have :
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Radius of drop= 16 micro meter
Density of ink = 1000 kg/m^3
Mass of a drop =?
Volume of sphere =4/3*Pi*r^3
Density=m/v >>>
m = 1.07* 10^(-11) kg
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E(electric field)=8.40
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