A pair of charged conducting plates produces a uniform field of 12,000 N/C, dire

Question

A pair of charged conducting plates produces a uniform field of 12,000 N/C, directed to the right, between the plates. The separation of the plates is 40 mm.


In Fig. 21.7 , an electron is projected from plate A, directly toward plate B, with an initial velocity of v0 = 2.0 x 107m/s. The velocity of the electron as it strikes plate B is closest to:

A pair of charged conducting plates produces a uniform field of 12,000 N/C, directed to the right, between the plates. The separation of the plates is 40 mm.


In Fig. 21.7 , an electron is projected from plate A, directly toward plate B, with an initial velocity of v0 = 2.0 x 107m/s. The velocity of the electron as it strikes plate B is closest to:

Explanation / Answer

force = qxE

=-1.6x 10^(-19)x12000=-19.2x10^(-16)

acceleration= F/M=-2.10x10^(15)

v^2=u^2+2as=(2x10^(7))^2-2x2.10x10^(15)x0.040=2.312x10^(14)m/s

v=1.52x 10^(7)m/s

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