Concept explainers
(a)
The speed of the electrons when they hit the screen.
(a)
Answer to Problem 52P
The speed of the electrons is
Explanation of Solution
Write the equation of motion according to the Newton’s second law.
Here,
Here, the initial velocity is
Conclusion:
Substitute
Therefore, the speed of the electrons is
(b)
The time taken for the electrons to travel the length of the tube.
(b)
Answer to Problem 52P
The time taken for the electrons to travel the length of the tube is
Explanation of Solution
Write the expression for the equation of motion for constant
Here,
For the
For the
Write the expression for the total time.
Substitute equation II and III in equation IV,
Conclusion:
Substitute
Therefore, the time taken for the electrons to travel the length of the tube is
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