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Tutorial ID | Title | Tutorial | Video Tutorial | Revision Notes | Revision Questions | |
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15.1 | Electric Current. Current Density |
1. A 3 C charge flows through a point of a conductor in 2 minutes. What is the current density flowing through a 4 cm2 frame?
Correct Answer: C
2. The cube shown in the figure is charged with a 12 μC/cm2 uniform surface charge.
A metal wire extends along the path a-b-c-d. What is the amount of current flowing through the wire if the current's velocity is 2 × 108 m/s? Assume all charge on the cube flows through the wire.
Correct Answer: A
3. A conducting wire is charged by a volume charge density of 12000 C/m3. What is the current flowing through the wire if electrons have a drift velocity of 3 mm/s? Take the wire's thickness equal to 6 mm2.
Correct Answer: B
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