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A wire of radius 5 mm is produced from a...

A wire of radius 5 mm is produced from a lump of copper. Another wire of the same mass but of diameter 1 cm is produced from another lump of copper. Determine the ratio of the resistances of the two wires.

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The correct Answer is:
`16:1`
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CHHAYA PUBLICATION-CURRENT ELECTRICITY -EXERCISE ( PROBLEM SET-I)
  1. The resistance of a uniform metallic wire is 1 Omega,its radius is 0.1...

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  2. The lengths diameters and resistances of two wire are in the ratio of ...

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  3. A wire of radius 5 mm is produced from a lump of copper. Another wire ...

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  4. A metal wire has a resistances of 5 Omega . If its length is doubled b...

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  5. A 1 m long metal wire has a cross sectional area of 0.1mm^2. Find out ...

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  6. The lengths,resistances and resistivities of materials of two wires-ea...

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  7. A nichrome wire of resisitivity 'rho' is stretched to make it 10% long...

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  8. A wire with a resistances 5 Omega is drawn out so that its new length ...

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  9. A wire of resistance 32 Omega is melted and drawn into a wire of half ...

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  10. The resistance of a copper wire at 20^@C is 3 Omega and at 100^@ is 3....

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  11. The temperature coefficient of resistance of copper is 42.5 times 10^-...

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  12. A voltage of 30 V is applied across a carbon resistor with first,secon...

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  13. The resistance of a platinum wire of platinum resistance thermometer a...

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  14. A carbon resistor is marked in coloured bands in the sequence blue,gre...

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  15. The sequence of bands market on a carbon resistor are yellow,red,orang...

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  16. What percent will be the equivalent resistance of two resistances 2 Om...

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  17. With two resistances 2 Omega and 3 Omega In parallel a third resistanc...

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  18. Equivalent resistances of two resistors in their series and parallel c...

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  19. The equivalent resistances of two resistances in parallel combination ...

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  20. There are 14 resistances each of magnitude 1 Omega. Keeping three of t...

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