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The figure shows a meter bridge wire AC having unifrom area o cross-section. X is a standard resistance of `4Omega` and Y is a resistance coil. When Y is immersed in melting ice the null point is at 40 cm from point A. when the coil Y is heated to `100^circ` C, a resistance of `100Omega` has to be connected in parallel with Y, in order to kkep the bridge balanced at the sam point. The temperature coefficient of resistance of coil is

A

`5*10^-3//^circC`

B

`2.3*10^-4//^circC`

C

`6.3*10^-4//^circC`

D

`3*10^-4//^circC`

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH INSTITUTE ENGLISH-Mock Test 28-EXAMPLE
  1. In the shows arrangement of a meter bridge, if AC corresponding to nul...

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  2. If in an experminal of wheastone bridge, the position of cells and gal...

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  3. The figure shows a meter bridge wire AC having unifrom area o cross-se...

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  4. In a potentiometer experiment, the balancing with a cell is at length ...

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  5. The current in the primary circuit of a potentiometer is 0.2 A. The sp...

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

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

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  8. Potentiometer is superior to voltmeter because

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

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

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

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

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

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

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

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

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

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

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

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

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