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A ring of radius R is charged uniformly ...

A ring of radius R is charged uniformly with a charge `+Q`. The potential at a point on its axis at a distance 'r' from any point on ring will be-

A

`(KQ)/(r )`

B

`(KQ)/(r^(2))`

C

`(KQ)/(r^(3))(r^(2) - R^(2))^(1//2)`

D

`(KQ r)/(R^(3))`

Text Solution

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The correct Answer is:
C
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MOTION-ELECTROSTATICS-Exercise - 2 (Objective Problems | NEET)
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  2. Choose the correct statements :- (a) The density of electric lines o...

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  3. A ring of radius R is charged uniformly with a charge +Q. The potentia...

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  4. Two positive charges of 1mu C and 2 mu C are placed 1 metre apart. The...

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  5. The electric field in a certain region is given by vec(E) = ((K)/(x^(3...

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  6. Two infinite linear charges are placed parallel to each other at a dis...

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  7. Fig. shows field lines of an electric field, the line spacing parallel...

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  8. Semicircular ring of radius 0.5 m is uniformly charged with a total ch...

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  9. A point particle of mass M is attached to one end of a massless rigid ...

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  10. A charge q = 10^(-6) C of mass 2g (fig.) is free to move then calculat...

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  11. Three point charges q, 2q and 8q are to be placed on a . 9cm long st...

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  12. In the electric field of charge Q, another charge is carried from A to...

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  13. Choose the incorrect statement :

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  14. A charge 10 esu is placed at a distance of 2 cm from a charge 40 esu a...

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  15. A point charge q of mass m is located at the centre of a ring having r...

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  16. Four chrages 2C, -3C, -4C and 5C respectively are placed at all the co...

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  17. Which statement is true :- (i) A ring of radius R carries a uniforml...

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  18. A non-conducting ring of radius 0.5 m carries a total charge of 1.11xx...

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  19. A spherical droplet having a potential of 2.5 volt is obtained as a re...

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  20. 15 joule of work has to be done against an existing electric field to ...

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