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Three charges each20muC are placed at th...

Three charges each`20muC` are placed at the corners of an equilateral triangle of side `0.4m` The potential energy of the system is

A

`18 xx 10^(-6)J`

B

9J

C

`9 xx 10^(-6)J`

D

27J

Text Solution

Verified by Experts

The correct Answer is:
D
`U = (1)/(4pi epsi_(0)) ((q_(1) q_(2))/(r_(12)) + (q_(2) q_(3))/(r_(23)) + (q_(3)q_(1))/(r_(13)))`
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NARAYNA-ELECTROSTATIC POTENTIAL AND CAPACITANCE-Exercise-2(C.W)
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  2. Electric potential is given by V = 6x - 8xy^(2) - 8y + 6yz - 4z^(2) ...

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  3. Three charges each20muC are placed at the corners of an equilateral tr...

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  4. Two charge each Q are released when the distance between is d .Then th...

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  5. A body of mass one gram and carrying a charge 10^(-8)C passes through ...

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  6. Here is a special parallelogram with adajacent side length 2a and a an...

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  7. The closed distance of approach of an alpha- particle travelling with ...

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  8. Three point charges 1C, -2C and -2C are placed at the vertices of an e...

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  9. Two equal point charges are fixed at x=-a and x=+a on the x-axis. Anot...

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  10. Three equal charges Q are placed at the three corners of an equilatera...

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  11. An electric dipole of length 20 cm having +-3xx10^(-3) C charge placed...

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  12. A molecule of a substance has a permanent electric moment of magnitude...

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  13. Two opposite and equal chrages 4 xx 10^(-8) coulomb when placed 2 xx 1...

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  14. Two thin wire rings each having a radius R are placed at a distance d ...

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  15. Two metal spheres A and B have their capacities in the ratio 3:4 they ...

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  16. A conducting shell S1 having a charge Q is surrounded by an uncharged ...

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  17. A spherical charged conductor has surface charge density sigma.The int...

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  18. Figure shows three spherical and equipotential surface 1,2 and 3 round...

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  19. A half ring of radius r has a linear charge density lambda.The potenti...

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  20. A parallel plate condenser has initially air medium between the plates...

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