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A point charge q1=+2.40muC is held stati...

A point charge `q_1=+2.40muC` is held stationary at the origin. A second point charge `q_2=-4.30muC` moves from the point x=0.150 m, y=0 to the point x=0 0.250 m, y=0.250 m. How much work is done by the electric force on `q_2`?

A

`-0.56J`

B

`-0.256J`

C

`-0.356J`

D

`-0.45J`

Text Solution

Verified by Experts

The correct Answer is:
C
`W=-/_\U=U_i-U_f=q_2V_i-q_2V_f`
`=q_2((kq_1)/r_1)-q_2((kq_1)/r_f)`
`=kq_1q_2(1/r_i-1/r_f)`
`=(9xx10^9)(2.4xx10^-6)(-4.3xx10^6)`
`(1/0.15-1/(0.25sqrt2))`
`=-0.356J`
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DC PANDEY-ELECTROSTATICS-Level 1 Objective
  1. A small particle has charge -5.00muC and mass 2.00 xx 10-4 kg. It move...

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  2. A plastic rod has been formed into a circle of radius R. It has a posi...

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  3. A point charge q1=+2.40muC is held stationary at the origin. A second...

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  4. A point charge q1 = 4.00 nC is placed at the origin, and a second poin...

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  5. Three point charges, which initially are infinitely far apart, are pla...

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  6. The electric field in a certain region is given by E=(5hati-3hatj)kV//...

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  7. In a certain region of space, the electric field is along +y-direction...

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  8. An electric field of 20 N//C exists along the x-axis in space. Calcula...

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  9. The electric potential existing in space is V(x,y,z)A(xy+yz+zx) (a) ...

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  10. An electric field E = (20hati + 30 hatj) N/C exists in the space. If t...

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  11. In a certain region of space, the electric potential is V (x, y, z) = ...

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  12. A sphere centered at the origin has radius 0.200 m. A-500muC point cha...

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  13. A closed surface encloses a net charge of -3.60 muC. What is the net e...

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  14. The electric field in a region is given by E = 3/5 E0hati +4/5E0j with...

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  15. The electric field in a region is given by E = (E0x)/lhati. Find the c...

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  16. A point charge Q is located on the axis of a disc of radius R at a dis...

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  17. A cube has sides of length L. It is placed with one corner atAthe orig...

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  18. Two point charges q and -q are separated by a distance 2l. Find the fl...

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  19. A point charge q is placed at the origin. Calculate the electric flux ...

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  20. A charge Q is distributed over two concentric hollow spheres of radii ...

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