Multiple choice

A proton is 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 kV, its kinetic energy will be

  1. 1 keV

  2. 10.2 keV

  3. 102.3 keV

  4. 1840 keV

  5. 1/1840 keV
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A Correct answer
Explanation

The kinetic energy or energy acquired by the electron on being accelerated by a potential difference of 1 kV = 1keV Moreover, as proton has the same charge and energy, Potential difference × charge = 1 keV Hence, proton will have the same kinetic energy.

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