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Two resistances are connected in the two gaps of a meter bridge. The balance point is `20 cm` from the zero end. When a resistance `15 Omega` is connected in series with the smaller of two resistance, the null point+ shifts to `40 cm`. The smaller of the two resistance has the value.

A

`8Omega`

B

`9Omega`

C

`10Omega`

D

`12Omega`

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TARGET PUBLICATION-CURRENT ELECTRICITY -Critical Thinking
  1. At which point will the null point be obtained on a metrebridge if the...

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  2. In a meter-bridge experiment with a resistance R(1) in left gap and a...

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  3. Two resistances are connected in the two gaps of a meter bridge. The b...

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  4. The material of wire of potentiometer is

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  5. A potentiometer wire is 10 m long and has a resistance of 2 Omega//"m...

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  6. A potentiometer wire has a resistivity of 10^(9)Omega cm and area of c...

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  7. A battery of e.m.f. 2 V and internal resistance 2Omega is connected to...

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  8. A resistance of 990Omega and a cell of emf 2 V is connected in series ...

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  9. An accumulator of 5 volt is connected through a resistance of 40Omega ...

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  10. The resistance per unit length of a wire is 1Omega//"m". A Leclanche c...

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  11. The e.m.f. E of the battery is balanced by p. d. across 75 cm of a pot...

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  12. A potentiometer having a wire of length 10 m and resistance 20 Omega i...

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  13. When two cells of e.m.f. 1.5 V and 1.1 V connected in series are bala...

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  14. When a balance point is obtained in a potentiometer for finding the in...

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  15. With resistances P and Q in the left and right gaps of a metre bridge...

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  16. A cell of e.m.f. 2 V and negligible internal resistance is connected i...

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  17. An accumulator of 4 V is connected through a resistance of 30Omega to ...

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  18. A potentiometer has uniform potential gradient. The specific resistanc...

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  19. In a potentionmeter experiment, when three cells A, B and C are connec...

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

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