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A ring of radius R is having two charges...

A ring of radius R is having two charges `q` and `2q` distributed on its two half parts. The electric potentiasl at a point on its axis at a distance of `2sqrt2 R` from its centre is `(k=1/(4piepsilon_0))`

A

`(3kq)/R`

B

`(kq)/(3R)`

C

`(kq)/R`

D

`(kq)/(sqrt3R)`

Text Solution

Verified by Experts

The correct Answer is:
C

`r=3R`
`V_p=(kq_("net"))/r=(k(3q))/(3R)=(kq)/R`
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DC PANDEY ENGLISH-ELECTROSTATICS-Level 1 Objective
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  8. Charge 2q and -q are placed at (a,0) and (-a, 0) as shown in the figur...

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  9. Five point charge (+q each) are placed at the five vertices of a regul...

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  10. Two identical small conducting spheres having unequal positive charges...

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  11. Three concentric conducting sphereical shells carry charges +4Q on the...

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  12. 1000 drops of same size are charged to a potential of 1 V each. If the...

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  14. Charges Q, 2Q, and -Q are given to three concentric conducting spherei...

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  18. A solid sphere of radius R has charge q uniformly distributed over its...

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  20. A pendulum bob of mass m charge q is at rest with its string making an...

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