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An accumulator of 5 volt is connected th...

An accumulator of 5 volt is connected through a resistance of `40Omega` to a potentiometer wire 10 m long and of resistance `10Omega`. For a cell, the null point is found at a length of 8 m from the common terminal. The current through the wire is

A

`0.05" A"`

B

`0.1" A"`

C

`0.15" A"`

D

`0.2`

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TARGET PUBLICATION-CURRENT ELECTRICITY -Critical Thinking
  1. Two resistances are connected in the two gaps of a meter bridge. The b...

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  2. The material of wire of potentiometer is

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  19. Assertion: In a metrebridge, length of the wire is 1 metre. Reason: ...

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  20. Assertion: A slide wire bridge is also called a metrebridge. Reason...

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