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With increase in temperature the resisti...

With increase in temperature the resistivity of metals …………………….. .

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

In the case of insulators, as the temperature decreases, resistivity ……………. .

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

Assertion: The kinetic energy of the electrons increases when temperature of the wire increases. Reason: An increasing temeperature conductivity of metallic wird decreases.

FULL MARKS-CURRENT ELECTRICITY-Additional Questions Solved (Fill in the blanks)
  1. The unit of specific resistance is .

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  2. The reciprocal of electrical resistivity is called ……………….. .

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  3. With increase in temperature the resistivity of metals …………………….. .

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  4. The specific resistance for the insulators is in the range of

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  5. The resistivity of semiconductors is of the order of ………………… .

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  6. The materials which conduct electricity at zero resistance are called ...

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  7. Conductors turn into superconductors at ……………………. .

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  8. The resistance of superconductors is …………………….. .

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

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  10. Mercury becomes a superconductor at …………………. .

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

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

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

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

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

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

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

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

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

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

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