Question

In the figure particles 1 and 2 of charge *q*_{1} = *q*_{2} = +22.40 × 10^{-19} C are on a *y* axis at distance *d* = 19.0 cm from the origin. Particle 3 of charge *q*_{3} = +20.80 × 10^{-19} C is moved gradually along the *x* axis from *x* = 0 to *x* = +6.88 m. At what values of *x* will the magnitude of the electrostatic force on the third particle from the other two particles be

**(a)** minimum and

**(b)** maximum?

What are the **(c)** minimum and **(d)** maximum magnitudes?

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