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Two positive point charges 15 muC and 10...

Two positive point charges `15 muC` and `10 muC` are 30 cm apart. Calculate the work done in bringing them closer to each other by 15 cm.

Text Solution

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The correct Answer is:
4.5 J
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Two charges of 5muC and 20muC are placed 20 cm apart. Calculate the work done in bringing the charges closer to 15 cm apart.

Two positive point charges of 0.2 muC and 0.01 muC are placed 10 cm apart. Calculate the work done in reducing the distance to 5 cm.

Knowledge Check

  • Two positive point charges of 12 mu C and 8 mu C are 10 cm apart. The work done in bringing then 4 cm closer is

    A
    `5.8 J`
    B
    `5.8 J`
    C
    `13 J`
    D
    `13 eV`

  • Two positive point charges of 12 and 5 microcoulombs, are placed 10 cm apart in air. The work needed to bring them 4 cm closer is

    A
    2.4 J
    B
    3.6 J
    C
    4.8 J
    D
    6.0 J

  • Two point charges of 20 mu C and 80 muC are 10 cm apart where will the electric field strength be zero on the line joining the charges from 20 mu C charge

    A
    0.1 m
    B
    0.04 m
    C
    0.033 m
    D
    0.33 m

    • Similar Questions

    Explore conceptually related problems

    Find the expression for the potential energy of a system of two point charges q_(1), and q_(2) glocated at vecr_(1) and vecr_(2) respectively in an external electric field vecE. (b) Draw equipotential surfaces due to an isolated point charge (-q) and depict the electric field lines. (c) Three point charges +1muC,-1 muC and +2muC are initially infinite distance apart. Calculate the work done in assembling these charges at the vertices of an equilateral triangle of side 10 cm.

    Two point charges A and B of value of +15 mu C and +9 mu C are kept 18 cm apart in air. Calculate the work done when charge B is moved by 3cm towards A.

    Two point charges of +1muC and +4muC are kept 30 cm apart. How far from the +1muC charge on the line joining the two charges, will the net electric field be zero?

    Two charges +20 muC and -20 muC are held 1 cm apart. Calculate the electric field at a point on the equatorial line at a distance of 50 cm from the center of the dipole.

    Two point charges - 5 mu C and + 3 muC are placed 64 cm apart . At what points on the line joining the two charges is the electric potential zero ? (Assume the potential at infinity to be zero) .

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