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Two point charges +10muC and -10muC are ...

Two point charges `+10muC` and `-10muC` are separated by a distance of 40 cm in air. How much work is required to separate the two charges infinitely away from each other?

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Knowledge Check

  • Two point charge q_(1) = 10 xx 10^(-8)C and q_(2) = -2 xx 10^(-8)C are separated by a distance of 6 cm in air. (i) The distance from q_(1) of the point of zero electric potential is

    A
    5 cm
    B
    2.5 cm
    C
    8 cm
    D
    10 cm

  • Two point charge q_(1) = 10 xx 10^(-8)C and q_(2) = -2 xx 10^(-8)C are separated by a distance of 6 cm in air. (ii) The electrostatic potential energy of the system is

    A
    `15 xx 10^(-3) J`
    B
    `24 xx 10^(-4) J`
    C
    `18 xx 10^(-3) J`
    D
    `-18 xx 10^(-4) J`

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    Explore conceptually related problems

    (a) Determine the electrostatic potential energy of a system consisting of two charges 7 µC and –2 µC (and with no external field) placed at (–9 cm, 0, 0) and (9 cm, 0, 0) respectively. (b) How much work is required to separate the two charges infinitely away from each other? (c) Suppose that the same system of charges is now placed in an external electric field E = A(1//r^(2)):A = 9 xx 10^(5) NC^(-1) . What would the electrostatic energy of the configuration be?

    An electric dipole is formed by two equal but opposite charges , each of magnitude 1mu C , separated by a distance of 5 cm. what is the magnitude of the torque required to place the dipole at right angles to an electric field of intensity 3 xx 10^5 N * C ^ ( - 1 ) ?

    Two charges of +40 esu and -35 esu separated by a distance of 10 cm, exert 4 dyn force on each other. Determine the dielectric constant of the medium.

    Two point charges each of magnitude +q are placed at a distance r from each other. Draw the lines of force in this case.

    Two point charges of 10 esu and 40 esu are located at points A and B seperated by a distance 4 cm. Find the electric field intensity at a point halfway between the charges.

    Two charges, + q and -q are separated by a distance d. At which points will the resultant electric field intensity be directed parallel to the line joining the charges ?

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