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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is mobility?
💡 Hint: Think about how charge carriers behave when an electric field is applied.
Question 2
Easy
What units are used for mobility?
💡 Hint: Consider the relationship between drift velocity and electric field.
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 mobility measure?
- The ability to store charge
- The ease of charge movement
- The potential difference
💡 Hint: Consider the definition of mobility.
Question 2
The unit of mobility is?
- True
- False
💡 Hint: Think about how mobility is expressed in calculations.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A copper wire has a cross-sectional area of 1 mm² carrying a current of 3 A. Assuming the density of free electrons is 8.5 x 10²⁸ m⁻³, find the drift velocity and mobility if the electric field is maintained at 1000 V/m.
💡 Hint: Use the relationship I = nAev_d for calculating drift velocity.
Question 2
A silicon device has a mobility of 1200 cm²/Vs and operates under an electric field of 500 V/m. What is the drift velocity? How does this affect its performance in electronic devices?
💡 Hint: Convert mobility to m²/Vs before calculating drift velocity.
Challenge and get performance evaluation