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Which among iron and mercury is a better...

Which among iron and mercury is a better conductor of electricity?

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The correct Answer is:
Iron
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Use the data in Table 3.1 to answer the following : (a) Which among iron and mercury is a better conductor ? (b) Which material is the best conductor ?

Which metal is the best conductor of electricity ?

The resistivity of three metals namely iron, silver and mercury are 10xx10^(-8) Omegam, 1.6xx10^(-8) Omega and 94xx10^(-8) Omega m respectively. Answer the following using given data (a) Which among iron, silver and mercury is the best conductor ? (b) If the length of the iron conductor is doubled, what will happen to its resistivity ? Given reason for your answers.

LAKHMIR SINGH & MANJIT KAUR-ELECTRICITY -Exercise
  1. On what factors does the resistance of a conductor depend ?

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  2. Name the material which is the best conductor of electricity.

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  3. Which among iron and mercury is a better conductor of electricity?

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  4. Why are copper and aluminium wires usually used for electricity transm...

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  5. Name the material which is used for making the heating element of an e...

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  6. What is nichrome? State its one use.

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  7. Why is nichrome used as a heating element ?

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  8. Why are coils of electric toasters and electric irons made of an alloy...

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  9. Which has more resistance: (a) a long piece of nichrome wire or shor...

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  10. (a) How does the resistance of a pure metal change if its temperature ...

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  11. Fill in the following blanks with suitable words: Resistance is meas...

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  12. (a) What do you understand by the ''resistivity'' of a substance? (b...

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  13. (a) Write down an expression for the resistance of a metallic wire in ...

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  14. (a) Give two examples of substances which are good conductors of elect...

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  15. Will current flow more easily through a thick wire or a thin wire of t...

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  16. How does the resistance of a conductor depend on: (a) length of the ...

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  17. (a) Give one example to show how the resistance depends on the nature ...

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  18. What would be the effect on the resistance of a metal wire of: (a) i...

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  19. How does the resistance of a wire vary with its: (a) area of cross-s...

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  20. How does the resistance of a wire change when: (i) its length is tri...

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