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Choose correct alternative. A wire of ...

Choose correct alternative.
A wire of length 20 cm has resistance `5 Omega`. It is stretched up to 60 cm, its resistance will be

A

`10 Omega`

B

`30 Omega`

C

`45 Omega`

D

`60 Omega`

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CHETANA PUBLICATION-ELECTRIC CURRENT THROUGH CONDUCTORS-EXERCISE
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  2. Choose correct alternative. Two wires of same material and same leng...

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  3. Choose correct alternative. A wire of length 20 cm has resistance 5 ...

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  4. Choose correct alternative. If R is the resultant resistance of n si...

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  5. Choose correct alternative. How many cells of emf 1.5 volt and inter...

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  6. Choose correct alternative. Six cells each of emf 1.4 volt and inter...

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  7. Choose correct alternative. Two resistance of 3 Omega and 2 Omega ar...

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  9. Choose correct alternative. One volt is equal to

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  10. Choose correct alternative. If R1 and R2 are the filament resistance...

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  11. Choose correct alternative. A uniform copper wire of resistance 5 Om...

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  12. Choose correct alternative. A current of 3.2 ampere is flowing in a ...

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  13. Choose correct alternative. The length of a conductor is halved. Its...

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  14. Choose correct alternative. When potential difference is not applied...

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  15. Choose correct alternative. A wire carries a current of 1 A. The num...

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  16. Choose correct alternative. A wire of resistance 100 Omegais cut int...

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  17. Choose correct alternative. A thin, uniform wire of resistance 40 Om...

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  18. Choose correct alternative. A wire of resistance R is cut into 'n' e...

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  19. Choose correct alternative. Two wires have their lengths in the rati...

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  20. Choose correct alternative. If a resistor has three colour bands nam...

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