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Consider a current carrying wire (current \(\text{I}\)) in the shape of a circle. Note that as the current progresses along the wire, the direction of \(\text{j}\) (current density) changes in an exact manner, while the current \(\text{I}\) remains unaffected. The agent that is essentially responsible for it is:
| 1. | source of emf. |
| 2. | the electric field produced by charges accumulated on the surface of the wire. |
| 3. | the charges just behind a given segment of wire which push them just the right way by repulsion. |
| 4. | the charges ahead. |
Subtopic: Â Current & Current Density |
 60%
Level 2: 60%+
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Which of the following characteristics of electrons determines the current in a conductor?
| 1. | Drift velocity alone. |
| 2. | Thermal velocity alone. |
| 3. | Both drift velocity and thermal velocity. |
| 4. | Neither drift nor thermal velocity. |
Subtopic: Â Current & Current Density |
 59%
Level 3: 35%-60%
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Consider a current carrying wire (current I ) in the shape of a circle. Note that as the current progresses along the wire, the direction of j (current density) changes in an exact manner, while the current I remain unaffected. The agent that is essentially responsible for is
1. source of emf.
2. electric field produced by charges accumulated on the surface of wire.
3. the charges just behind a given segment of wire which push them just the right way by repulsion.
4. the charges ahead
1. source of emf.
2. electric field produced by charges accumulated on the surface of wire.
3. the charges just behind a given segment of wire which push them just the right way by repulsion.
4. the charges ahead
Subtopic: Â Current & Current Density |
 76%
Level 2: 60%+
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- 1(current)
Q. No.
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