A-Level
EDEXCEL
Physics
January 2020
1 Marks
QP-202001-Physics-U2 · Question 5
Question (excerpt):
5 A copper wire has a cross‑sectional area of 5.0 × 10–7 m2. There is a current in the wire of 0.93 A. Copper has 8.4 × 1028 conduction electrons per metre cubed. Which of the following gives the magn…
5 A copper wire has a cross‑sectional area of 5.0 × 10–7 m2. There is a current in the wire of 0.93 A. Copper has 8.4 × 1028 conduction electrons per metre cubed. Which of the following gives the magn…
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