Concept explainers
Imagine a proton at rest a certain distance from a negatively charged plate. It is released and collides with the plate. Then imagine the similar case of an electron at rest the same distance away from a plate of equal and opposite charge. In which case would the moving particle have the greater speed when the collision occurs? Why?
To identify: The case in which particle will have greater speed when the collision occurs.
Answer to Problem 43A
The electron will have greater speed when collision occurs.
Explanation of Solution
Introduction:
It is known that proton is heavier than electron, that is mass of the proton is greater than mass of the electrons.
The charge on the electrons and protons are same. Hence, same amount of electrostatic force will act. But the mass of the proton is higher than that of the electrons. Mass has the inertial properties of any object. It resists any change in its previous state. Therefore, speed of the electrons will be higher than the proton speed.
Conclusion:
Electrons will have higher speed than protons.
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