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Three charges 2 muC , -4 muC and 8 muC a...

Three charges 2 `mu`C , -4 `mu`C and 8 `mu`C are places at the three vertices of an equilateral triangle of side 10 cm. The potential at the centre of triangle is

A

`14xx10^4` J/C

B

`9xx10^4` J/C

C

`54xx10^4` J/C

D

`54sqrt3 xx10^4` J/C

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The correct Answer is:
D
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AAKASH INSTITUTE ENGLISH-Mock Test 25: PHYSICS-Example
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  2. A charge -3 muC is placed at one corner of cube of side 9 cm . The pot...

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  3. Two charges -4 muC and 8 muC are 27 cm apart. The distance from the fi...

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  4. An electric field vec E=20y hat j exist in space . The potential at (...

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  5. A body moves from point A to B under the action of a force, varying in...

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  6. Potential of electric ield vector is given by V= 9 (x^3 - y^3 ), (wher...

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  7. In the figure given below , the zero potential is taken at infinity. T...

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  8. The electric field strenth vector is given by E=2.5x hat I + 1.5y hat...

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  9. Two point charges 4 mu C and -2 mu C are separated by a distance of 1...

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  10. Two electric dipoles are placed parallel to each other as shown in fig...

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  11. The potential due to a short electric field dipole moment2xx10^-6 C-m ...

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  12. Six charges , q1 = +1 muC , q2 = +3 muC , q3 = +4 muC , q4 = -2 muC , ...

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  13. A test charge q is taken from point A to B in electrostatic field of o...

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  14. Two charges are placed s shown in figure below. The potential at point...

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  15. Two Charges 5 muC and 20 muC are placed on two concentric circes of ra...

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  16. Three charges 2q,-q,-q are located at the vertices of an equilateral t...

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  17. Three concentric spherical shells have radii a, b and c(a lt b lt c) a...

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  18. Two charges +6 'mu'C and -6 'mu'C are placed 15 cm apart as shown . At...

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  19. The electric potential at a point (x,y,z) is given by V =- x^(2) y - x...

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  20. The electric field in a certain region is given by E=5 hat(i)-3hat(j) ...

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