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1. Two point charges are located on the x-axis: -8 µC at x = 5 cm,...

1. Two point charges are located on the x-axis: -8 µC at x = 5 cm, and +32 µC at x = 7 cm. Find the equilibrium point on the x-axis, and state whether it is stable or metastable for positive test charges.

2. A 9 µC charged particle with a mass of 10 mg is placed 9 cm from a 1 mC particle that is fixed in place. Find the acceleration of the free particle using 9 GJ·m/C² for the Coulomb Constant.

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Answer #1

We will use result for electric field due to point charge

E=(KQ)/(r2). For equilibrium electric field due to two charges should be in opposite directions.

1 5cm7cm 6 Crm 6 6 [o on=a=

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