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Q. 11

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 1081

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Short Answer

An alpha particle (a bare helium nucleus with ) acceler-ates across a potential difference, starting from rest. What is the particle’s kinetic energy in eV when it reaches the negative electrode? This question requires no mathematics beyond what you can do in your head.

The particle kinetic energy in eV when it reaches the negative electrode is 200eV.

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Step by Step Solution

Step 1: Given information

We have given

And it is starting from rest so initial velocity is zero and due to which

Step 2: Explanation

As we know,

Work done by all forces = Change in Kinetic Energy

=

Since here work is only done due to potential difference so-

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