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You are given several identical resistor...

You are given several identical resistors each of value `5Omega` and each capable of carrying a maximum current of 2A. It is required to make a suitable combination of these resistances to produce a resistance of `2.5Omega` which can carry current of 4A. The minimum number of resistances required for this job is 

A

2

B

4

C

6

D

8

Text Solution

Verified by Experts

The correct Answer is:
A
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AAKASH SERIES-CURRENT ELECTRICITY-EXERCISE - II
  1. Three resistances 1Omega,2Omega and 3Omega are connected in parallel. ...

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  2. Two wires of the same material and having lengths in the ratio of 2:3 ...

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  3. You are given several identical resistors each of value 5Omega and eac...

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  4. V-i graph for a metal wire at temperature is as shown in figure

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  5. A copper wire of cross-sectional area 3.4 mm and length of the wire 40...

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  6. Two different wires have specific resistivity, Tengths, area of cross-...

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  7. Two wires made of same material have their length are in the ratio 1:2...

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  8. Four wires made of same material have different lengths and radii, the...

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  9. A copper wire of cross sectional area 0.01 mm^(2)? is used to prepare ...

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  10. If a copper wire is stretched to increase its length by 0.1%. Then per...

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  11. A wire of resistance 18 ohm is drawn until its radius reduces 1//2^(th...

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  12. If an iron wire is drawn to decrease its radius by 0.5 %. Then percent...

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  13. A conducting liquid is filled in a vessel of area of cross section A u...

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  14. A network of resistore is connected to a 16 V battery with internal re...

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  15. A wire of resistance 'R' is cut into four equal parts and they are bun...

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  16. A wire of resistance 18 ohm is bent to form an equilateral triangle. T...

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  17. Four conductors of resistance 16Omega each are connected to form a squ...

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  18. A piece of wire of resistance 4Omega is bent through 180^(@) at its mi...

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  19. When two resistances are connected in parallel then the equivalent res...

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  20. A technician has only two resistance coils. By using them singly in se...

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