If a copper rod carries a direct current, the magnetic field associated with the current will be
A. only inside the rod
B. only outside the rod
C. both inside and outside the rod
D. neither inside nor outside the rod
Answer:C
If a copper rod carries a direct current, the magnetic field associated with the current will be
A. only inside the rod B. only outside the rod C. both inside and outside the rod D. neither inside nor outside the rod