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Cathode Ray Experiment

A proton is a...

Question

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

A

1 k e V

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B

\frac{1}{1840} k e V

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C

2 k e V

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D

2.6 k e V

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Solution

The correct option is A $1 k e V$
Kinetic energy = charge $\times$ potential difference
$K E = e \times 1 k V$
$K E = 1 k e V$

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