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General Physics Previously Asked Questions: Conductivity
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General Physics Previously Asked Questions: Conductivity
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16 Questions

1. Which one of the following metals is used as semi-conductor in transistors?
2. The highest temperature attained by a super conductor is
3. Which of the following is a semiconductor?
4. Assertion (A): Copper rods are generally preferred to iron rods for making lightning conductors. Reason (R): Copper is better conductor of electricity than iron and is not easily oxidized under atmospheric conditions. Code
5. At which temperature superconductivity can be of tremendous economic interest saving billions of rupees?
6. Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R). Assertion (A): Transformer is useful for stepping up or stepping down voltages. Reason (R): Transformer is a device used in D.C. circuits. In the context of the above two statements, which one of the following is correct?
7. The resistance of a semi-conductor on heating
8. The Government of India has totally banned the export of Burnt coal (Jhama) because it contains recoverable amount of a metal/ element which is used in transistors. Which one of the following is that element?
9. The newly discovered high temperature super conductors are
10. At absolute zero temperature, the electric resistance in semiconductor is
11. Assertion (A): In India, electricity distribution companies calculate the consumption of electricity in kWh. Reason (R): Electrical system in India works at a frequency of 60 Hz. Code
12. Which one of the following is an important component of a transistor?
13. The characteristic of super conductor is
14. The conductivity of a semiconductor at zero degree Kelvin is
15. Electric conduction in a semiconductor takes place due to
16. The most commonly used material for making transistors is

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