A $4\mathrm{.}0$ nC charge is placed $2\mathrm{.}0$ cm from a fixed $-1\mathrm{.}0$ nC charge. If the $4\mathrm{.}0$ nC charge is moved to a point $6$ cm from the $-1\mathrm{.}0$ nC charge, by what factor does the magnitude of the force on the $4\mathrm{.}0$ nC charge change?

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To calculate the factor by which the magnitude of the force on the 40 nC charge changes when it is m... View the full answer