Loading the lesson
Loading the lesson
Search AllRounder.ai
Search the courses, subjects, tracks, games and features, or jump straight to a page.
Search the courses, subjects, tracks, games and features, or jump straight to a page.
3 cards from this section. Quick, good the night before a test.
What is electric current?
Think about what a continuous movement of charge would imply.
What causes free electrons to move in a conductor?
Recall the direction in which positive and negative charges move.
What defines electric current?
Think about charge movement, not thermal or other forms.
Drift velocity is a measure of:
Consider how charges are influenced by electric fields in conductors.
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.
Remember to convert your measures to SI units before calculating!
Discuss how increasing temperature affects the resistivity of a conductor and how that impacts current flow.
Think about the relationship between temperature, resistivity, and conductor material.
4 more questions in this section. Enroll free to practise them all.
Enroll free