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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the formula for velocity in a velocity selector?
💡 Hint: Recall the balance of forces on the charged particle.
Question 2
Easy
Name a device that uses velocity selectors.
💡 Hint: Think of devices that analyze charged particles.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does a velocity selector do?
- A device that accelerates particles
- A device that sorts particles by speed
- A device that analyzes mass
- A device that only operates at high speeds
💡 Hint: Think about its role in analyzing particles.
Question 2
True or False: In a velocity selector, particles that move at speeds other than E/B are not deflected.
- True
- False
💡 Hint: Recall how forces act on the particles.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A beam of electrons is injected into a velocity selector where the electric field is set at 300 N/C, and the magnetic field is 0.05 T. Calculate the speed of electrons that pass through undeflected.
💡 Hint: Substitute the known values into the velocity formula.
Question 2
In a mass spectrometer, ions with a charge of +1.6 × 10⁻¹⁹ C move through a velocity selector where E=600 N/C and B=0.04 T. After passing through, they enter a magnetic field. Calculate the radius of the circular path they will take if they are moving at the speed calculated previously.
💡 Hint: Use the previously calculated velocity of the particle to find its radius.
Challenge and get performance evaluation