1. Why does the flow of electric current occur in a conductor?
A- Due to the flow of electros
A- Due to the flow of electros
2. Define electric current ?
A- It is movement of electrons predominantly in one direction.
A- It is movement of electrons predominantly in one direction.
3. Why is there flow of current in the Gases ?
A- It is because of the Electrons, Positive and Negative Ions
A- It is because of the Electrons, Positive and Negative Ions
4. What are the minimum requirements for the flow of current?
A- A voltage source and a conductor.
5. What is the velocity of current through a copper conductor?
A- It is of the order of a few micro meter/second.
A- It is of the order of a few micro meter/second.
6. What is meant by the Draft velocity of Electron?
A- It is very small in comparison to speed of light.
A- It is very small in comparison to speed of light.
7. What is the necessary condition for the validity of Ohms law?
A- The temperature should remain constant.
8. Define Resistance?
A- A resistance of a conductor is the hindrance by virtue of which the conductor opposes the flow of current through it.
9. Two wires are there having the same material and their lengths are in the ratio l and 2l and there radius are r and 2r respectively. What is the ratio of their specific resistances.
A- 1:1
10. How is resistance of a wire related to the number of free electrons available?
A- Inverse Relation.
A- Inverse Relation.
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