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A wire with a resistances 5 Omega is dra...

A wire with a resistances `5 Omega` is drawn out so that its new length is three times its original length. Find the resistance of the longer wire. What would be the effect on resistivity?

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The correct Answer is:
`45 Omega`, no effect
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CHHAYA PUBLICATION-CURRENT ELECTRICITY -EXERCISE ( PROBLEM SET-I)
  1. The lengths,resistances and resistivities of materials of two wires-ea...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  16. The resistance of an electrical appliance is 200 Omega and it can with...

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  17. The ratio of three resistances is 1:2:3 if the greatest resistance be ...

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  18. Emf of an electric cell is 2.1 V and its internal resistance is 0.1 Om...

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  19. Emf of an electric cell is 1.5 V and its internal resistance Is 2 Omeg...

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  20. A cell of emf 2.1 V and 0.1 Omega internal resistance sends 100 mA cur...

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