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29 August, 16:08

A negative charge of - 2 C and a positive charge of 4 C are separated by 84,681 m. What is the force between the two charges?

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  1. 29 August, 16:23
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    Answer: - 10N

    Explanation:

    Given that,

    negative charge (q1) = - 2 C

    positive charge (q2) = 4 C

    Distance between charges (r) = 84,681 m

    force between the two charges (F) = ?

    Apply the formula for

    F = (kq1q2) / r^2

    Recall that k is Coulomb's constant with a value of 9 * 10^9 Nm2C-2

    Then,

    F = (9 * 10^9 Nm2C-2 x - 2C x 4C) / (84,681 m) ^2

    F = (-7.2 x 10^10) / (84,681 m) ^2

    F = - 9.998N (Rounded up to nearest whole number as - 10N)

    Thus, the force between the two charges is - 10 newton
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