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KVPY2018PhysicsElectrostatics

One can define an alpha-volt ( α - V ) to be the energy acquired by an α -particle when it is accelerated by a potential of 1   V . For this problem, you may take a proton to be 2000 times heavier than an electron. Then,

Options

  1. A1 α - V = 1   e V / 4000
  2. B1 α - V = 2   e V
  3. C1 α · V = 8000   e V
  4. D1 α - V = 1 e V

Correct answer

B. 1 α - V = 2   e V

Step-by-step solution

An alpha-volt ( α - V ) is the energy acquired by an α -particle (charge 2 units) when accelerated by a potential difference of 1   V . ∴    1 α - V = q   ( Δ V ) . = 2 e × 1   V = 2   e V

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