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In a potentiometer experiment, the balan...

In a potentiometer experiment, the balancing with a cell is at length 240 cm. On shunting the cell with a resistance of `2 Omega`, the balancing becomes 120 cm. The internal resistance of the cell is

A

`1Omega`

B

`0.5Omega`

C

`4Omega`

D

`2Omega`

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The correct Answer is:
D
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AAKASH INSTITUTE ENGLISH-Mock Test 28-EXAMPLE
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  4. The current in the primary circuit of a potentiometer is 0.2 A. The sp...

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  5. The length of a wire of a potentiometer is 100 cm, and the emf of its ...

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  6. In the figure the potentiometer wire AB of length L and resistance 9 r...

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  7. Potentiometer is superior to voltmeter because

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  8. The figure shows a potentiometer arrangement. D is the driving cell, C...

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  9. A charge + Q is moving upwards vertically. It enters a magnetic field ...

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  10. If an electron enters a magnetic field with its velocity pointing in t...

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  11. When a charged particle enters ina uniform magnetic field then its kin...

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  12. If a charged particle is moving in a plane perpendicular to a uniform ...

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  13. In a magnetic field vecB=hati+yhatj+3hatk a charge particle (q, m) is ...

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  14. If a chraged particle at rest experiences no electromagnetic force, ...

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  15. An electron is moving along the positive x-axis . A uniform electr...

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  16. A charged particle has acceleration veca=2hati+xhatj in a magnetic fie...

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  17. The force vecF experienced by a particle of charge q moving with a vel...

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  18. If a proton is projected in a direction perpendicular to a uniform mag...

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  19. An electron is moving along positive x-axis. To get it moving on an an...

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  20. Two particle X and Y having equal charge, after being accelerated thro...

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