balls have the same amount of charge, but the charge on ball A is positive and t

Question

balls have the same amount of charge, but the charge on ball A is positive and the charge on ball B is c balls are placed on a smooth, level, frictionless table whose top is an insulator. Which of the following is Since the force on A is equal but opposite to the force on B They will move They will move together with constant acceleration. Since the force on both balls is negative, they will move in the negative direction. None of the above is correct. The electric field in a cathode ray tube is supposed to accelerate electrons from 0 to 1.6 Times 10^7 m/s in a distance of 5.00 cm. What electric field is required? (m_e = 9.11 Times 10-31 kg and e = 1.60 Times 10^-19 C). The beam of electrons that hits the serene of an oscilloscope is moved up and down by:

Explanation / Answer

First find the electron's acceleration. Use v^2 = Vo^2 + 2ax.
(v, Vo, and x have been given to you.)

a=2.56*1015m/s2

Using F=ma to find the force.

F= 2.33*10-15N
Then using E = F/q, to find the electric field.

E=14562N/C

So looking for most closest answer

E=14600N/C i.e (C)

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