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Four equal charges Q are placed at the f...

Four equal charges `Q` are placed at the four corners of a square of each side is 'a'. Work done in removing a charge `-Q` from its centre to infinity is

A

zero

B

`(sqrt2q^(2))/(pi in_(0)a)`

C

`(sqrt2q)/(pi in_(0)a)`

D

`(q^(2))/(pi in_(0)a)`

Text Solution

Verified by Experts

The correct Answer is:
B
`V= (1)/(4p in_(0)) (q)/(r ) and W = Vq`
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NARAYNA-ELECTROSTATIC POTENTIAL AND CAPACITANCE-Exercise -1 (H.W)
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  2. Figure below shows a square array of charged particles, with distance ...

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  3. Four equal charges Q are placed at the four corners of a square of eac...

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  4. Two tiny spheres carrying charges 1.8 muC and 2.8 mu C are located at ...

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  5. Two tiny spheres carrying charges 1.8 muC and 2.8 mu C are located at ...

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  6. A hexagon of side 8 cm has a charge 4 muC at each of its vertices. The...

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  7. On the axis of a short electric dipole at a point potential is V. If t...

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  8. The potential at a point P' on the axial line of the short dipole on t...

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  9. The magnitude of electric field intensity at a point on the axis of sh...

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  10. The distance between H^(+) and Cl^(-) ions in HCl molecules is 1.38Å. ...

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  11. If the electric field is given by vec(E ) = ((100)/(x^(2)))i the poten...

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  12. A charge of 5 C experiences a force of 5000N when it is kept in a unif...

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  13. ABC is an equilateral triangle of side 2m. If vec(E ) = 10NC^(-1), " t...

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  14. The electric potential at a point (x,0,0) is given by V=[(1000)/(x)+(1...

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  15. Two positive point charges of 12 mu C and 8 mu C are 10 cm apart. The ...

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  16. Two charges of magnitude 5 nC and -2 nC are placed at points (2cm,0,0...

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  17. Three charges Q, +q and +q are placed at the vertices of a right angle...

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  18. An electric dipole has the magnitude of its charge as q and its dipole...

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  19. An electric dipole of moment vecp is placed normal to the lines of for...

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  20. An insulated charged conducting sphere of radius 5cm has a potential o...

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