A Pair of Charged Conducting Plates Produces a Uniform Field

question 1102

Multiple Choice

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.An electron is projected from plate A,directly toward plate B,with an initial velocity of v_o = 2.0 × 10⁷ m/s,as shown in the figure.(e = 1.60 × 10^-19 C,
Ε₀ = 8.85 × 10^-12 C²/N • m²,m_el = 9.11 × 10^-31 kg) The velocity of the electron as it strikes plate B is closest to

• A) 1.2 × 10⁷ m/s.
• B) 1.5 × 10⁷ m/s.
• C) 1.8 × 10⁷ m/s.
• D) 2.1 × 10⁷ m/s.
• E) 2.4 × 10⁷ m/s.

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