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The figure shows a potentiometer arrange...

The figure shows a potentiometer arrangement. D is the driving cell, C is the cell whose emf is to be determined. AB is the potentiometer wire and G is a galvanometer. J is a sliding contact which can touch any point on AB. Which of the following are essen tal condition for obtaining balance?

A

The emf of D must be greater than the emf of C

B

The positive terminals of D and C both must be joined to A

C

The galvanometer must show zero reading

D

All of these

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The correct Answer is:
D
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AAKASH INSTITUTE ENGLISH-Mock Test 28-EXAMPLE
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  2. Potentiometer is superior to voltmeter because

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

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

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

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

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

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

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

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

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

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

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

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

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

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  16. An electron enters a region where magnetic field (B) and electric fiel...

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  17. Lorentx force can be calculated by using the formula.

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  18. H^(+), He^(+) and O^(2+) ions having same kinetic energy pass through ...

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  19. A charged particle goes undeflected in a region containing electric a...

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  20. A particle is projected in a plane perpendicular to a uniform magnetic...

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