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The total resistance in the parallel com...

The total resistance in the parallel combination of three resistances `9Omega, 7Omega and 5Omega`

A

`1.22Omega`

B

`2.29Omega`

C

`4.22Omega`

D

`2.02Omega`

Text Solution

Verified by Experts

The correct Answer is:
D
In the parallel combination of three resistance's resistance is `(1)/(R_("eq"))=(1)/(R_(1))+(1)/(R_(2))+(1)/(R_(3))`
`or (1)/(R_("eq"))=(1)/(9)+(1)/(7)+(1)/(5)=(143)/(315),R_("eq")=(315)/(143)=2.02Omega`
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NCERT FINGERTIPS-CURRENT ELECTRICITY-Combination Of Resistors : Series And Parallel
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  2. Combine three resistors 5Omega, 4.5Omega and 3Omega in such a way that...

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  4. Equivalent resistance (in ohm) of the given network is

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  5. Which arrangement of 3Omega resistors will give a total resistance of ...

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  6. The equivalent resistance of series combination of four equal resistor...

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  7. Five equal resistances of 10Omega are connected between A and B as sho...

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  8. The correct combination of three resistances 1Omega, 2Omega and 3Omega...

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  9. Equivalent resistance of the given network between points A and B is

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  10. n resistors each of resistance R first combine to give maximum effecti...

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  11. The equivalent resistance between A and B for . the circuit shown in t...

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  12. A copper cylindrical tube has inner radius a and outer radius b. The r...

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  13. A wire of resistance 12 Omega m^(-1) is bent to from a complete circle...

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  14. A and B are two points on a uniform ring of resistance 15Omega. The lt...

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  15. Two metal wires of identical dimesnios are connected in series. If sig...

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  16. Three resistors 2Omega, 4Omega and 5Omega are combined in parallel. Th...

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  17. Three resistors of resistances 3Omega, 4Omega and 5Omega are combined ...

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  18. The reading of ammeter shown in figure is

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  19. Three resistances 2Omega, 4Omega, 5Omega are combined in series and th...

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  20. In the circuit shown in the given figure, the resistances R(1) and R(2...

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