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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is electric current?
💡 Hint: Think about what a continuous movement of charge would imply.
Question 2
Easy
What causes free electrons to move in a conductor?
💡 Hint: Recall the direction in which positive and negative charges move.
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 defines electric current?
- Flow of heat
- Flow of electrons
- Flow of electric charge
💡 Hint: Think about charge movement, not thermal or other forms.
Question 2
Drift velocity is a measure of:
- True
- False
💡 Hint: Consider how charges are influenced by electric fields in conductors.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A copper wire has a length of 2 m and a cross-sectional area of 1.0 × 10–6 m² carrying a current of 0.5 A. Calculate the drift velocity of the electrons if there are approximately 8.5 × 10²⁸ free electrons per cubic meter.
💡 Hint: Remember to convert your measures to SI units before calculating!
Question 2
Discuss how increasing temperature affects the resistivity of a conductor and how that impacts current flow.
💡 Hint: Think about the relationship between temperature, resistivity, and conductor material.
Challenge and get performance evaluation