An Electron Is Released from Rest at the Negative Plate

question 49

Multiple Choice

An electron is released from rest at the negative plate of a parallel-plate capacitor.If the distance across the plates is 5.0 mm and the potential difference across the plates is 20 V,with what velocity does the electron hit the positive plate? (m_e = 9.1 × 10−³¹ kg,e = 1.6 × 10−¹⁹ C)

• A) 1.3 × 10⁶ m/s
• B) 1.0 × 10⁶ m/s
• C) 2.7 × 10⁶ m/s
• D) 5.3 × 10⁶ m/s

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