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The phenomenon of superconductivity was ...

The phenomenon of superconductivity was discovered by ………………………. .

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FULL MARKS-CURRENT ELECTRICITY-Additional Questions Solved (Fill in the blanks)
  1. Conductors turn into superconductors at ……………………. .

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  2. The resistance of superconductors is …………………….. .

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  3. The phenomenon of superconductivity was discovered by ………………………. .

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  4. Mercury becomes a superconductor at …………………. .

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  5. With increase of temperature, resistance of conductors ……………………….. .

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  6. In insulators and semiconductors, as temperature increases, resistance...

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  7. A material with a negative temperature coefficient is called a …………………...

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  8. the temperature co-efficient of resistance for alloys is

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  9. The electric current in an external circuit flows from the ………………….. .

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  10. In the electrolytic cell, current flows from …………………. .

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  11. A freshly prepared cell has ………………… internal resistance.

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  12. State the sign convention for applying Kirchhoff's first rule.

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  13. The current law states that the algebraic sum of the currents meeting ...

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  14. Current law is a consequence of conservation of …………………….. .

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  15. Sate Kirchhoff's voltage rule.

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  16. Kirchhoff's second law is a consequence of conservation of …………….. .

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  17. Wheatstone bridge is used for ………………… .

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  18. ………………… is a form of Wheatstone's bridge.

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  19. The temperature coefficient of manganin wire is ……………….. .

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  20. Name the instrument which is used to measure potential difference.

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