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A copper wire of resistance R is cut int...

A copper wire of resistance `R` is cut into ten parts of equal length. Two pieces each are joined in series and then five such combination are joined in parallel. The new combination will have resistance

A

`R`

B

`R/4`

C

`R/5`

D

`R/25`

Text Solution

Verified by Experts

The correct Answer is:
D
Five parallel combination, each of value
`R/10+R/1=R/25`
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DC PANDEY ENGLISH-CURRENT ELECTRICITY-Level 1 Objective
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  2. A part of a circuit is shown in figure. Here reading of ammeter is 5A ...

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  3. A copper wire of resistance R is cut into ten parts of equal length. T...

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  4. Two resistances are connected in two gaps of a meter bridge. The balan...

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  5. In the given circuit, the voltmeter records 5 volt. The resistance of ...

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  6. The wire of potentiometer has resistance 4Omega and length 1m. It is c...

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  7. The potential difference between points A and B, in a section of a cir...

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  8. Two indentical batteries, each of emf 2V andinternal resistance r=1Ome...

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  9. For a cell, the terminal potential difference is 2.2 V, when circuit i...

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  10. Potentiometer wire of length 1 m is connected in series with 490 Omega...

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  11. Find the ratio ofcurrents as measured by ammeter in two cases when the...

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  12. A galvanometer has a resistance of 3663Omega. A shunt S is connected a...

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  13. The network shown in figure is an arrangement of nine identical resist...

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  14. The equivalent resistance of the hexagonal network as shown figure be...

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  15. A uniform wire of resistance 18 Omega is bent in the form of a circle....

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  16. Each resistor shown in figure is an infinite network of resistance1Ome...

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  17. In the circuit shown in figure the total resistance between points A a...

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  18. In the circuit shown in figure R=55 Omega the equivalent resistance be...

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  19. The resistance of all the wires between any two adjacent dots is R. Th...

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  20. A uniform wire of resistance 4Omega is bent into circle of radius r. ...

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