2. An ink drop with a mass of 1.8x10 10 kg and a negative charge of magnitude 2.

Question

2. An ink drop with a mass of 1.8x10 10 kg and a negative charge of magnitude 2.5x10 13 Centers a region between two charged plates. Assume that the electric field between the plates is uniform and has a magnitude of 1.7x106 NIC. If the ink drop enters the electric field with an initial velocity of 29 m/s perpendicular to the field, calculate its deflection after traveling 5.0 cm through the electric field. If the ink drop is traveling to the right and the electric field points downward, will the ink drop be deflected upward or downward?

Explanation / Answer

use,

deflection , d=1/2*a*t^2

d=1/2*(q*E/m)*(l/v)^2

d=1/2*(2.5*10^-13*1.7*10^6)/(1.8*10^-10)*((5*10^-2)/29)^2

d=3.51*10^-3 m or 3.51 mm

deflection is upward

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