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An electron is made to enters symmetrically between two parallel and equally but oppositely charged metal plates, each of 10 cm length. The electron emerges out of the field region with a horizontal component of velocity 10 6 m/s. If the magnitude of the electric field between the plates is 9.1 V/cm, then the vertical component of velocity of electron is (mass of electron = 9.1 × 10 –31 kg and charge of electron = 1.6 × 10 –19 C)

1. 1 × 10 6 m/s
2. 0
3. 16 × 10 6 m/s
4. 16 × 10 4 m/s

Correct answer: 16 × 10 6 m/s

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