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8) A charge of +2 micro-coulombs is placed in a uniform electric field and electric force...

8) A charge of +2 micro-coulombs is placed in a uniform electric field and electric force acting on the charge is 14.7 Newtons in the +x direction. What is the magnitude of the electric field in x 106 N/C and in what direction is it? Indicate the -x direction, by including a negative sign.

9) A positive charge of 9 micro-coulombs with some mass is placed on a string and placed in a uniform electric field of 4.1 x 106 N/C in the -x direction. It swings to some angle with the vertical before coming to equilibrium. What is the x component of its tension in Newtons? (Hint: just sum the forces in the x direction.)

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