Concept explainers
The speed of electrons when they are emitted.
Answer to Problem 71GP
Explanation of Solution
Given data:
Voltage is
Mass of electron is
Formula used:
The energy of motion is known s kinetic energy. The formula of kinetic energy is
Where,
Potential energy:
Where,
Calculation:
The kinetic energy of the electron is converted completely to potential energy at the plate since they are stopped. In this, energy of proton is provided by the UV light.
To calculate the emitted speed, use energy conservation and take
So,
Conclusion:
The required value is
Chapter 17 Solutions
Physics: Principles with Applications
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